Genji, Blade of the Shimada

Whenever Genji would be dealt damage, you may pay {5} to prevent that damage and put a charge counter on Genji.
{w},{t}: Remove 6 charge counters from Gengi. Gengi gets +8/+0, and has vigilance, trample, lifelink, indestructible, and deathtouch until the end of this turn.
"I was hoping for a challenge."