Illusory Pact

Cumulative Upkeep - Gain 1 life.
At the beginning of your pre-combat main phase, return target creature whose mana cost is equal to the number of age counters on Illusory Pact from a graveyard to the battlefield.
When Illusory Pact leaves the battlefield, you lose life equal to twice the amount of life you gained with it. Sacrifice all of your creatures.
The demon with a friendly smile tends to be far more successful than his uglier brethren.