*Ahem*
There are eight decks with four upgradeable cards each
There are two cards per deck that are upgraded by following the sixteen card clues that drop randomly from Tribute reward coffers.
There is one card per deck that has a random chance of being auto-upgraded after you finish a match; this can happen after NPC matches or PVP matches, though this may be tied to gaining a rank. Either way just keep playing and these will eventually unlock.
There is one card per deck that is upgraded for finishing that deck's "use the patron 10 times in matched play" achievements. If you don't want to tank your rank, these can be done in casual queued matches.
If you found that information helpful, shoot an 'insightful' my way. *tips hat*
Edited by Saucy_Jack on 12 June 2022 06:47 ALL HAIL SNUGGLORR THE MAGNIFICENT, KING OF THE RNG AND NIRN'S ONE TRUE GOD! Also, become a Scrub-scriber!
SJ Scrubs: Playing games badly to make you feel better about yourself.