Monkey D. Luffy

Whenever a creature deals damage to Monkey D. Luffy, deal that much damage/2 (rounded down) to that creature.
{2}{r}{r}: Level up ({2}{r}{r}: Put a level counter on this. Level up only as a sorcery.)
Level 1: Reach. Level 2: First strike. 5/5
Level 3 Monkey D. Luffy may block multiple creatures. 6/8.
Level 4 Monkey D. Luffy gains flying, indestructible, and trample. 8/8. At the end of the turn remove all counters from Monkey D. Luffy.