Yone, Two-Face Hunter

First strike, Haste.
Every time Yone, the Two-Faced Hunter attacks, create a “demon form” creature token, which goes to attack instead of Yone, the Two-Faced Hunter.
If Demon Form deals combat damage to a player, put two +1/+1 counters on Yone, Two-Faced Hunter. Sacrifice Demon Form at the end of the fight.