Leyla, Living Chaos

{x}{t}: Each player sacrifices X creatures and
draws X cards. Each opponent loses life equal to
half the amount of cards in his or her hand
(rounded up). You gain one life for each card in
your hand.
Each player may cast a spell for free during their
turn.
Whenever a creature leaves a graveyard, put a
+1/+1 counter on Leyla, Living Chaos.