Abandoned Sarcophagus + Infinite Reflection + Rith's Attendant + Flourishing Fox

Abandoned Sarcophagus

Infinite Reflection

Rith's Attendant

Flourishing Fox

How it works

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

Infinite Reflection does some fascinating heavy lifting here, permanently transforming all your nontoken creatures—including any Flourishing Fox you cast—into exact copies of Rith's Attendant. Because your cloned Flourishing Fox loses its native cycling ability in the process, Abandoned Sarcophagus fails to exile it when it goes to the graveyard, allowing you to continually recast it from your graveyard for just {W}. Each loop, you sacrifice the creature for Rith's Attendant's activated ability to net a tidy profit of {R}{G}{W} mana, turning a clever rule interaction into an endless engine of death, sacrifice, and multicolored wealth.