I saw someone mention the shrine to lamashtu. Seelah kills it at that location! Examine top card; it's a boon; put it on the bottom! As mentioned already, Siren, harpy, warchanter, satyr. Every character seems to have his kryptonite (except Lem, he's broken). My least favorite boons are all the evade spells. I love playing mages: Ezren, Lini, Lem, but I would prefer defeating the banes rather than avoiding them.