Goku, Instinctive Warrior

Vigilance, Flying, Trample, Haste, First Strike.
When Goku, Instinctive Warrior deals combat
damage to a player, each player reveals the top
card of their library. You get X Ki, where X is
the total converted mana cost of each card
revealed this way.
Pay 2 Ki: Put a +1/+1 counter on Goku,
Instinctive Warrior.
Remove 5 +1/+1 counters from Goku, Instinctive Warrior: It gains your choice of Hexproof or Indestructible until end of turn.