I heard in one of the ESO live episodes that the multiplier will apply to this quests rewards but so far i have open 2 sacks and the multiplier didn't count, if this is a bug i want the Telvar Stones that i didn't got from opening this sacks if this is intended then the only way for PVE players to get massive amounts of telvar is just gone.
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My opinions and posts are mostly on a PvE setting.