Ven, Sith Assassin

You start the game on the Dark Side.
Haste, trample.

Use the Force - Whenever Ven attacks
•Light Side: Ven gains lifelink until end of turn.
•Dark Side: Ven deals 3 damage to the defending player or a creature they control. You lose 4 life.

You may flip to the Light Side when your life total becomes 6 or less.