The Temporal Shard

: As The Temporal Shard enters the battlefield, create a legendary 1/1 Human token named Serich the Deathless under target opponent's control.
+2: Lose 3 life and draw a card, then deal 1 damage to any target.
-10: If Serich the Deathless is on the battlefield, its owner loses the game. Otherwise, transform The Temporal Shard.