Sheoldred

MenaceWhen Sheoldred enters the battlefield, each opponent sacrifices a nontoken creature or planeswalker.: Exile Sheoldred, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery and only if an opponent has eight or more cards in their graveyard.

(As this Saga enters and after your draw step, add a lore counter.)I — For each opponent, destroy up to one target creature or planeswalker that player controls.II — Each opponent discards three cards, then mills three cards.III — Put all creature cards from all graveyards onto the battlefield under your control. Exile The True Scriptures, then return it to the battlefield(front face up).