Remembrance + Mortuary + Carrion Feeder + Shield Sphere

Remembrance

Mortuary

Carrion Feeder

Shield Sphere

How it works

1. Activate Carrion Feeder by sacrificing Shield Sphere.
2. When Shield Sphere dies, Mortuary and Remembrance trigger.
3. Resolve the Mortuary trigger, putting Shield Sphere from your graveyard on top of your library.
4. Resolve the Remembrance trigger, searching your library for Shield Sphere and putting it into your hand.
5. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it.
6. Cast Shield Sphere by paying 0.
7. Repeat.

This clever loop relies on Shield Sphere's cost of zero to keep your engine running without draining your mana reserves. Each time you sacrifice the Sphere to Carrion Feeder, Mortuary neatly recycles it back to the top of your library, while Remembrance simultaneously tutors another copy straight into your hand. This lets you recast the Sphere for free immediately, feeding your Carrion Feeder an endless stream of sacrifices to grow infinitely large while racking up unbounded triggers.