Gengi, Master of Blades

When Gengi, Master of Blades enters the battlefield or destroys a creature, deal 2 damage to target creature. If that creature dies, repeat this process.
Whenever Gengi, Master of Blades deals damage, put an ultimate counter on Gengi.
Remove 5 ultimate counters. Gengi, Master of Blades gets +5/+0 until end of turn and does 2 damage to target creature
Firststrike, Haste