Zap-Zap, Goblin Technician

{1}{t}: Regenerate target artifact, then put a
charge counter on Zap-Zap, Goblin Technician.
{3}{t}: Remove three charge counters from
Zap-Zap: Return target artifact from your
graveyard to the battlefield.
When Zap-Zap dies, he deals damage to each
creature equal to the number of charge counters
on him.