Notes:
Cost and damage values vary based on character level.
All Ultimate, Active and Passive skill data was collected from level 1 characters with the following exceptions:

• Mages' Guild, Fighters' Guild and The Undaunted skill line data was collected from level 3 characters.
• Alliance War, Lycanthropy and Vampirism skill line data was collected from characters of various levels.

Morphs:
Morph data is difficult to collect because it's not shown until the morphs become available. Since there are many variables that affect morph specs like range, duration, cost, etc. and because they can be unlocked at different times ... those numbers are hard to compare across skill lines. Because of all this, I have not filled in any of the spec data on morphs, only the name and the new effect.

Legend:
Ability Types: {U} = ultimate; [A] = active; [M] = morph; (P) = passive
Stats: RANK = skill rank required; LVLS = ability levels; CAST = cast time (inst=instant, s=seconds, pass=passive, chan=channel); TGT = target; RG/RAD = range/radius (m=meters, rg=range, rd=radius); DUR = duration in seconds; COST = ability cost (ult=ultimate, mag=magicka, stam=stamina)


NIGHTBLADE

Skill Line - Assassination
{U} Death Stroke : RANK - 12, LVLS - 1, CAST - inst, TGT - enemy, RG/RAD - 5 m rg, DUR - 0.0, COST - 50 ult, v1.0, 2014-03-27
* Deals 25 damage while reducing healing received by 50%
* Damage increases as player's Ultimate charge increases, up to 275%
[M] M1: Incapacitating Strike : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Stuns target for a few seconds if the caster has lower health than target
[M] M2: Soul Harvest : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - While slotted you gain more Ultimate from kills

[A] Assassin's Blade : RANK - 1, LVLS - 1, CAST - inst, TGT - enemy, RG/RAD - 5 m rg, DUR - 0.0, COST - 25 mag, v1.0, 2014-03-27
* Deals 14 Magic damage
* Low Health targets take 300% additional damage
[M] M1: Killer's Blade : RANK - 7, LVLS - 0, CAST - inst, TGT - enemy, RG/RAD - 5 m rg, DUR - 0.0, COST - 46 mag, v0.17, 2014-02-07
* New Effect - Heals you when ability kills a target
* Heals player for 15% max health when killing an opponent with this ability
[M] M2: Impale : RANK - 7, LVLS - 0, CAST - inst, TGT - enemy, RG/RAD - 15 m rg, DUR - 0.0, COST - 46 mag, v0.17, 2014-02-07
* New Effect - Ability may be used at range
[A] Teleport Strike : RANK - 4, LVLS - 1, CAST - 0.8 sec, TGT - enemy, RG/RAD - 22 m rg, DUR - 0.0, COST - 53 mag, v1.0, 2014-03-27
* Player moves through the shadows, appearing next to the target
* Deals 16 Magic damage to enemies and stuns monsters for 1.5s
[M] M1: Lotus Fan : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Reduced initial damage, no stun, snares by 60-70% and deals damage over 6s
[M] M2: Ambush : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Next attack on the target deals more damage
[A] Blur : RANK - 20, LVLS - 1, CAST - inst, TGT - self, RG/RAD - none, DUR - 20.0, COST - 49 mag, v1.0, 2014-03-27
* Enemies have 15% miss chance when attacking you, for 20s
[M] M1: Mirage : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Misses have a chance to set target off balance for 3s
[M] M2: Double Take : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - When activating this ability gain an additional 15% miss chance for 2s
[A] Mark Target : RANK - 30, LVLS - 1, CAST - inst, TGT - enemy, RG/RAD - 50 m rg, DUR - 60.0, COST - 70 mag, v1.0, 2014-03-27
* Marks a target for death
* Player's attacks ignore 75% of target's Armor and Spell Resistance, and target's attacks ignore 75% of player's Armor and Spell Resistance
* Killing a marked target restores player's health by 37%
[M] M1: Piercing Mark : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Cost reduced with each level, able to see stealthed and invisible
[M] M2: Reaper's Mark : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Heal increases to 60 and gains attack and spell power for 30s after killing a marked target
[A] Haste : RANK - 42, LVLS - 1, CAST - inst, TGT - self, RG/RAD - none, DUR - 17.0, COST - 49 mag, v1.0, 2014-03-27
* For 17s, increase attack speed with light and heavy attacks by 30%
[M] M1: Focused Attacks : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Adds stamina regen
[M] M2: Incapacitate : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Roots target for 2s every 10 hits

(P) Master Assassin I/II : RANK - 8, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* While using Assassination abilities:
* Increases Weapon Damage while using Invisibility or Stealth by [5%/10%]
* Successful crouched attacks stun for a longer duration
(P) Executioner I/II : RANK - 14, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* While using Assassination abilities:
* Killing an enemy with an Assassination ability restores [12/24] Magicka over 6s
(P) Pressure Points I/II : RANK - 22, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* With an Assassination ability slotted:
* Increases Critical Strike rating by [1%/2%] for each Assassination ability slotted
(P) Hemorrhage I/II : RANK - 39, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* With an Assassination ability slotted:
* Increases bonus Critical Strike damage by [5%/10%]

Skill Line - Shadow
{U} Consuming Darkness : RANK - 12, LVLS - 1, CAST - inst, TGT - area, RG/RAD - 5 m rad, DUR - 12.0, COST - 200 ult, v1.0, 2014-03-27
* Creates an area of darkness for 12s
* Enemies in this area are snared 70%
* Nearby allies take 30% less damage and caster gains an additional +100% of this value
* Grants allies in the area Slip Away, allowing them to gain invisibility
[M] M1: Consuming Darkness : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Adds a heal to the synergy
[M] M2: Veil of Blades : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Deals damage every 0.5s for duration

[A] Shadow Cloak : RANK - 1, LVLS - 1, CAST - inst, TGT - self, RG/RAD - none, DUR - 2.5, COST - 56 mag, v1.0, 2014-03-27
* Gives player invisibility for 2.5s
[M] M1: Shadowy Disguise : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - While invisible, you gain increased critical strike rating
[M] M2: Dark Cloak : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Removes one DoT effect
[A] Veiled Strike : RANK - 4, LVLS - 1, CAST - inst, TGT - enemy, RG/RAD - 5 m rg, DUR - 0.0, COST - 35 mag, v1.0, 2014-03-27
* Deals 22 Magic damage
* If stealthed, attack sets enemy off balance and stuns them for 4s
[M] M1: Surprise Attack : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Reduces armor by 40% for 12s
[M] M2: Concealed Weapon : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Adds stealth movement speed while slotted
[A] Path of Darkness : RANK - 20, LVLS - 1, CAST - inst, TGT - area, RG/RAD - 4 m rad, DUR - 10.0, COST - 53 mag, v1.0, 2014-03-27
* Enemy targets in front of player take 1 Magic damage every second for 10s
* Paths may only be seen by player and increases movement speed 50% for duration
[M] M1: Twisting Path : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Larger conal AoE
[M] M2: Refreshing Path : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Very minor heal per second for caster
[A] Aspect of Terror : RANK - 30, LVLS - 1, CAST - inst, TGT - area, RG/RAD - 6 m rad, DUR - 0.0, COST - 60 mag, v1.0, 2014-03-27
* Induces fear in 2 nearby enemies for 4s
[M] M1: Mass Hysteria : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Snares and reduces affected target's power for 3s after fear ends
[M] M2: Manifestation of Terror : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Sets a fear trap, target cap removed
[A] Summon Shade : RANK - 42, LVLS - 1, CAST - inst, TGT - enemy, RG/RAD - 28 m rg, DUR - 17.0, COST - 35 mag, v1.0, 2014-03-27
* Summons a shade to attack target enemy for 17s
* Attacked enemies deal 15% less damage for 4s
[M] M1: Dark Shades : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Splits your shade into 2, each dealing less damage
[M] M2: Shadow Image : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Activating again teleports player to shade

(P) Refreshing Shadows I/II : RANK - 8, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* While using Shadow abilities:
* Increases Stamina regen by [15%/30%] for 6s when a Shadow ability is activated
(P) Shadow Barrier I/II : RANK - 14, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* While using Shadow abilities:
* Increases Armor and Spell Resistance by [17/35] for 4s when coming out of Stealth or Invisibility
(P) Fortitude I/II : RANK - 22, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* With a Shadow ability slotted:
* Increases Max Health by [2%/4%] for each Shadow ability slotted
(P) Dark Veil I/II : RANK - 39, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* While using Shadow abilities:
* Increases duration of Shadow abilities by [8%/15%]

Skill Line - Siphoning
{U} Soul Shred : RANK - 12, LVLS - 1, CAST - inst, TGT - area, RG/RAD - 6 m rad, DUR - 0.0, COST - 150 ult, v1.0, 2014-03-27
* Nearby enemies take 33 Magic damage and are stunned for 3s
* An ally may activate the Soul Leech synergy initiating a high damage life-stealing attack
[M] M1: Soul Tether : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Closest enemy is tethered to you, taking magic damage while near
[M] M2: Soul Siphon : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Siphon your health into nearby allies

[A] Strife : RANK - 1, LVLS - 1, CAST - inst, TGT - enemy, RG/RAD - 28 m rg, DUR - 10.0, COST - 35 mag, v1.0, 2014-03-27
* Deals 18 Magic damage and heals player for 25% of the damage inflicted, every 2s for 10s
[M] M1: Funnel Health : RANK - 7, LVLS - 0, CAST - inst, TGT - enemy, RG/RAD - 28 m rg, DUR - 10.0, COST - 65 mag, v0.17, 2014-02-07
* New Effect - Also heals a nearby ally
* Heals two nearby allies for 30% of the damage inflicted, every 2s for 10s
[M] M2: Swallow Soul : RANK - 7, LVLS - 0, CAST - inst, TGT - enemy, RG/RAD - 28 m rg, DUR - 10.0, COST - 65 mag, v0.17, 2014-02-07
* New Effect - Receive more healing while ability is slotted
* Player also receives 7% more healing from all sources while ability is slotted
[A] Agony : RANK - 4, LVLS - 1, CAST - 1.5 sec, TGT - enemy, RG/RAD - 28 m rg, DUR - 12.0, COST - 42 mag, v1.0, 2014-03-27
* Stuns enemy for 12s, effect is broken by damage from any source
* After effect ends enemy takes 10 Magic damage over 5s
[M] M1: Prolonged Suffering : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - DoT effect remains even if the stun effect ends
[M] M2: Malefic Wreath : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Does magic damage to nearby enemies as well
[A] Cripple : RANK - 20, LVLS - 1, CAST - inst, TGT - enemy, RG/RAD - 28 m rg, DUR - 8.0, COST - 42 mag, v1.0, 2014-03-27
* Siphons movement speed from enemy and gives it to player while dealing 25 Magic damage over 8s
[M] M1: Crippling Grasp : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - On impact does a little extra damage and immobilizes for 1.5s
[M] M2: Debilitate : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Reduces target's attack speed, scales with level
[A] Siphoning Strikes : RANK - 30, LVLS - 1, CAST - inst, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* While toggled, basic weapon attacks restore 4% Magicka and Stamina, but reduce Weapon and Spell Damage by 28%
* 10% chance on basic weapon to restore 15% Magicka and Stamina
[M] M1: Leeching Strikes : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Basic attacks heal you for 2% max health
[M] M2: Siphoning Attacks : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Abilities also have a 10% chance to restore 15% stamina and magicka
[A] Drain Power : RANK - 42, LVLS - 1, CAST - inst, TGT - area, RG/RAD - 8 m rad, DUR - 17.0, COST - 46 mag, v1.0, 2014-03-27
* Deals 11 Magic damage to nearby enemies and increases Weapon Damage by 6% for each enemy damaged, for 17s
[M] M1: Power Extraction : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Target cap increased to 9, weapon damage increased
[M] M2: Sap Essence : RANK - , LVLS - 0, CAST - none, TGT - none, RG/RAD - none, DUR - 0.0, COST - 0 , v0.16, 2014-01-11
* New Effect - Damage removed, heals based on targets hit

(P) Catalyst I/II : RANK - 8, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* Increases potion effectiveness by [10%/20%]
(P) Magicka Flood I/II : RANK - 14, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* With Siphoning ability slotted:
* Increases Max Magicka [4%/8%] while a Siphoning ability is slotted
(P) Soul Siphoner I/II : RANK - 22, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* While using Siphoning abilities:
* Increases Healing from Siphoning abilities by [8%/15%]
(P) Transfer I/II : RANK - 39, LVLS - 2, CAST - pass, TGT - self, RG/RAD - none, DUR - 0.0, COST - 0 , v1.0, 2014-03-27
* While using Siphoning abilities:
* Bestows [1/2] Ultimate when dealing damage with a Siphoning ability