The Silver Key

This card enters the battlefield tapped. Whenever
a player gains control of this card, tap it.
You cannot activate abilities of this card if you
own and control it
{t}: This card's controller takes an extra turn after
this one, then this card's owner takes an extra
turn. At the end of the controller's extra turn,
that player's life total becomes 1. This card's
owner gains control of it.
"You should never have forgotten, Umr. My
gifts have their price." -Al'Jiraad E'hkk