Slave of the Hell's

whenever a creature enters the battle field, it get -x/-x until end of turn, where x is its power.
whenever a creature dies, exile it instead.
When Slave of the Hell's leaves the battle field, deal x damage to each player, where x is the number of cards in Exile.
Nyla was now stuck in the nine hell's, a slave to to Asmodeus- Karenth, Demonologist.