March of the Machine: Sheoldred

Menace
When 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.

Back
The True Scriptures
Enchantment - Saga
(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).