Sadako

Cursed Tape - When an opponent gains control of
Sadako, put a condemned counter on each creature
they control, then destroy all creatures with 3 or
more condemned counters. Sadako may not attack
you or planeswalkers you control.

{2}: Target player gains control of Sadako. If an
opponent gains control of Sadako this way, that
opponent get's a condemned counter. This ability
may only be activated by it's original owner once
each turn.