[H&V] Heroes & Villains

Tap all lands your opponents control.
Create a number of Treasure artifact tokens equal to the number of your opponents. They have ", Sacrifice this Treasure: Gain one mana of any color."

When you set this scheme in motion, for each opponent exile a creature or planeswalker that player controls.
Whenever one or more creatures controlled by an opponent deal combat damage to you, that player choose a card exiled with this scheme. Return that card to the battlefield under its owner's control.
At the beginning of your upkeep, bury a card exiled with this scheme. Then, if there remains no card exiled with this scheme, abandon it.