The Broken Fourth Circle

{t}: Add either {w} or {b} to your mana pool

{t}: Add 2 to your Demonic Essence Pool to use for any Demon with a Mana Cost containing {w}, {b} or {w/b}

While tapped, grant all Ally Demonhost, Lesser Demon and Greater Demon creatures -1/-0. For each Son of the Fourth Circle is on your battlefield, this is instead +1/+1. If Kaihrhos is on your battlefield, grant an additional +2/+1

There will be no rest, no allowance of my Demon brother's. Let their Retribution be Damnation - Kaihrhos, The Venge