Necromancer:

I think some sort of zombie that infects on a succesful bite attack.  Infected creature would get an infect token that does 2 damage, and then one additional infect token each turn.  then, when it dies it comes back as a zombie creature with the infect trait.

Druid:

Big legendary treant type creature with hydro immunity.  Rivers for wall conjurations.  Treant is healed when it crosses river, or gaind regenerate 3 when adjacent to a river.