Sh'Tol's Crusade

During your upkeep, exile target creature from
the battlefield. Their owner may pay life equal
to the converted mana cost to prevent the action.
When there are no more creatures on the battlefield, exile Sh'Tol's Crusade
In the latter part of the war, much to the amazement
of Mor'Chai, the Avatars of Day forsook the light
while claiming they still fought for it.