Abandoned Sarcophagus + Infinite Reflection + Verdant Eidolon + Sandbar Merfolk

Abandoned Sarcophagus

Infinite Reflection

Verdant Eidolon

Sandbar Merfolk

How it works

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

This clever loop turns a humble blue merfolk into a relentless mana engine by leveraging the persistent replication of Infinite Reflection to rewrite reality. When you cast Sandbar Merfolk from your graveyard thanks to the permissions granted by Abandoned Sarcophagus, the enchantment ensures it enters the battlefield as a copy of Verdant Eidolon. Because this clone effect strips away its original text box, the replacement clause on Abandoned Sarcophagus fails to exile it when it hits the graveyard. From there, you simply activate its newly acquired sacrifice ability to generate a surplus of colored mana, using that windfall to recast Sandbar Merfolk and repeat the cycle indefinitely.