Genji, Soul of Dragons

+2: Prevent all combat damage to target creature or player until your next upkeep.
-1: Target creature you control gets +3/+3, vigilance, and "This creature can't be blocked by more than one creature" until end of turn.
0: Genji deals damage to target creature equal to the number of loyalty counters on him. That creature deals damage to Genji equal to its power.