Valentin, Nightmare Fueled

Skulk
Whenever Valentin deals damage to a player, each opponent discards a card. If at least one nonland
card was discarded , reveal cards from the top of
your library until you reveal a nonland card with
mana cost equal to or less than the greatest mana
cost of cards discarded this way. You may cast it
without paying its mana cost, if you do, you lose
life equal to it's converted mana cost. Put all
cards revealed this way on the bottom of your
library in any order.