Talladax, The World Eater

First Strike, Evade, Backlash, Annihilator 2
Bond: When a demon you control dies, destroy target non-black non demon creature your opponent controls. If Talladax, The World Eater dies, destroy all non-demon creatures. If you control Theros, The Haunted, Kagdos, The Beheader, or both, when a demon you control attacks all demons you control get +1/+1 and proliferate. If you control both, do this twice.