Blackie-Chan

At the beginning of your upkeep, generate X
amount of ammo counters equal to the number
of artifacts equipped to Blackie-Chan.
{t}{x}{u/r}; Deal X damage to target player/creature
equal to the number of ammo counters on
Blackie-Chan.
At the beginning of your end step, remove all
but 10 ammo counters from Blackie-Chan.
"I close my eyes, but I won't sleep tonight."
-Blackie-Chan