John Wick, Vengeful Assassin

Flash, Avenge (Whenever a hound dies, put two +1/+1 counters on this creature)
Protection from hounds. If this creature has a
+1/+1 counter on it, it has Lifelink, Deathtouch, Indestructible. When this creature enters the battlefield, target opponent creates a 1/1 Black
Hound creature token with "Whenever this
creature deals combat damage to a player, put a
+1/+1 counter on this creature. This creature
must attack each turn if able."