Voodoo Doll
{6}
Artifact
At the beginning of your upkeep, put a pin counter on ~this~.
At the beginning of your end step, if ~this~ is untapped, destroy ~this~ and it deals damage to you equal to the number of pin counters on it.
{X}{X}, {T}: ~this~ deals damage equal to the number of pin counters on it to any target. X is the number of pin counters on ~this~.