Hai'sta

You cannot cast Hai'sta.
Indestructible, Hexproof.
Hai'sta is black and white
When Hai'sta enters the battlefield target player loses the game.
When Hai'sta deals combat damage to a player that player discards their hand and each other opponent discards a card and you put a number of +1/+1 counters on Hai'sta equal to the number of cards discarded.