Ken Amada, Youthful Warrior

Don't look down on me!: Whenever
Ken Amada, Youthful Wartior does fatal damage to
a creature with a higher power put a +0/+1 counter
on Ken Amada, Youthful Warrior.
Nemesis: When Ken Amada, Youthful Warrior
enters the battlefield declare an opponent as your
nemesis. Whenever you attack your nemesis destroy
an artifact or enchantment.