Mercenaries PvE Treasures Guide?

I can’t find a list of possible treasures for each mercenary for PvE mode. So I don’t know what I’m looking for to high roll. Duels and dungeon run type formats have treasure guides. I heard hysteria for Xyrella is good and I did a quick search and can’t even find what it is. This is the first time in Hearthstone’s history where this information is not easily found.