'Devil's Poolside Gambit'

Flip a coin. If heads, gain +2 attack this turn. If tails, opponent's highest health card loses -2 health.

Whenever an enemy card dies, gain +1 attack permanently. 'A soul lost is a soul gained.'

If you have exactly 3 cards in hand, draw an extra card and discard a random card from your hand. 'The house always shuffles.'

-2/-2 to all enemy cards. 'When I fall, the house falls with me.'