In that case, the palgue is causing the card advantage, not the Evnervation.
but if you happen to have no other damage-cards in your hand, then enevration is a dead card. That's why I'd like to see a cantrip on it. (cantrips are good from a design perspective too, and they also reward playskill)
(btw, I like the card concept, that's why I choose this card to write about
)
