Maedhros of the Left Hand

Menace
Son of Feanor (For each player that controls a Silmarillion artifact, at the beginnning of each end step sacrifice a permanent you control. Only sacrifice a Son
of Feanor permanent if all other permanents you control
have this ability. For each permanent sacrificed this
way, each of those players must pay {1} or 2 life. If
they don't, gain control of that Silmarillion artifact.
Repeat this process until you have no more permanents
or no other player controls such artifacts)