Abandoned Sarcophagus + Infinite Reflection + Treva's Attendant + Wild Dogs

Abandoned Sarcophagus

Infinite Reflection

Treva's Attendant

Wild Dogs

How it works

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

This fascinating loop turns a humble hound into a self-sustaining mana engine by leveraging how static copy effects interact with the graveyard. With Infinite Reflection transforming your nontoken creatures into copies of Treva's Attendant as they enter, casting Wild Dogs allows it to hit the battlefield as a copy of the Attendant—completely stripping away its original creature types and abilities, including its pesky drawback and its Cycling ability. Because Abandoned Sarcophagus normally exiles cycling cards put into the graveyard un-cycled, losing that cycling keyword is the crucial loophole that lets you sacrifice Wild Dogs to its own activated ability for {G}{W}{U}, send it to the graveyard safely, and recast it infinitely.