Out of the Tombs + Leveler + Alchemist's Apprentice

Out of the Tombs

Leveler

Alchemist's Apprentice

How it works

1. Cast Leveler by paying 5.
2. When Leveler enters the battlefield, it triggers, exiling your library.
3. Activate Alchemist's Apprentice by sacrificing it, causing you to return Alchemist's Apprentice from your graveyard to the battlefield due to Out of the Tombs.
4. Repeat step 3.

With Leveler already on the battlefield having completely exiled your library, Out of the Tombs steps in with its crucial replacement effect to turn any attempted draw into a graveyard-to-field rescue mission instead of a loss. By sacrificing Alchemist's Apprentice to its own ability, you attempt to draw a card while your library is empty, forcing Out of the Tombs to instead pull that very same Alchemist's Apprentice straight from your graveyard back onto the battlefield. This creates an endless loop of sacrifices and returns, effortlessly generating infinite creature entry, leave-the-battlefield, death, and sacrifice triggers.