Icon of Madness

Trample, Forbidden (This creature starts the game
in exile)
If you or an opponent controls at least 5
creatures, you may cast Icon of Madness for its
mana cost. As an additional cost to cast this spell, sacrifice 2 permanents.
When Icon of Madness enters the battlefield, all
other creatures gain a +2/+0 and "This creature
cannot block." If Icon of Madness deals combat
damage or dies, exile it and one target permanent.