Until end of turn, whenever you gain life, if a white creature is on the battlefield, Hounds you control get +0/+2 and have protection from Devils until end of turn.
Seance of Seance {1W} |Instant| Until end of turn, whenever you gain life, if a white creature is on the battlefield, Hounds you control get +0/+2 and have protection from Devils until end of turn. / Destroy target Zombie.