Abandoned Sarcophagus + Infinite Reflection + Hollow One + Catalyst Elemental

Abandoned Sarcophagus

Infinite Reflection

Hollow One

Catalyst Elemental

How it works

1. Cast Hollow One either from your hand or from your graveyard by paying at most 1, causing it to enter the battlefield as a copy of Catalyst Elemental due to Infinite Reflection.
2. Activate Hollow One by sacrificing it, adding .
3. If you cast Hollow One from your graveyard, Hollow One is not exiled by Abandoned Sarcophagus due to Infinite Reflection removing Hollow One's cycling ability.
4. Repeat.

This delightfully strange loop transforms a cheap artifact creature into a renewable mana source by playing on how replacement effects interact. With Infinite Reflection turning every nontoken creature into a copy of enchanted creature—which we apply to Hollow One—your copies enter the battlefield as Catalyst Elemental instead of their normal selves. Because these copies lack a printed cycling ability, Abandoned Sarcophagus's exile replacement effect completely ignores them when they hit the graveyard, allowing you to continually recast Hollow One from your graveyard with its cost heavily reduced by its own cycling ability. You can then repeatedly sacrifice the copy to Catalyst Elemental's ability to generate infinite red mana, death triggers, and storm count.