Shinzaku, the Return

First Strike, Vigilance, Warrior (whenever this
creature attacks or blocks you may pay {x} to give it
+X/+X until end of turn)
Energy Pulse—{p/u}: Activate only once per game:
Draw 10, then exile 5 cards from your hand, then
play up to 5 cards from your hand and/or
graveyard without paying their mana costs. At
end of this turn, discard your hand. Shinzaku
must be equipped to use this ability.