Cop-3r, The Last Myr

Whenever Cop-3r, The Last Myr is dealt damage, it deals double that damage to target creature or player.
{x}: Return Cop-3r, The Last Myr to the battlefield with X +1/+1 counters on it. This may be cast from exile.
No matter what the Phyrexians did, Cop-3r never died, and he always slipped away from them.