Chains of Sorrow

When chains of sorrow enters that battlefield,
exile all creatures with power 4 or greater.
Repentance: If a permanent you control has
left the battlefield this turn, cast Chains of
Sorrow as an instant instead, lose 2 life.
The chains rip people from their families, those who
love them, secludes them from all emotion and feeling,
and subjugates their minds and enslaves them.
The darkness is crueler than evil itself. -Aeora, Angel