Rith, the Awakener + Breath of Fury + Utopia Mycon + Fervor

Rith, the Awakener

Breath of Fury

Utopia Mycon

Fervor

How it works

1. Deal combat damage using Rith and the creature with Breath of Fury attached, triggering Rith and Breath of Fury.
2. Resolve the Rith trigger, causing you to pay 2 to create at least four 1/1 Saproling creature tokens.
3. Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to a Saproling token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
4. Move to your next combat phase, and deal combat damage using Rith and the creature with Breath of Fury attached, triggering Rith and Breath of Fury.
5. Holding priority, activate Utopia Mycon's second ability three times by sacrificing three Saprolings, adding 2.
6. Repeat from step 2.

This vibrant engine centers on Rith, the Awakener dealing combat damage to churn out an army of Saproling tokens, which are instantly granted the ability to attack the moment they enter thanks to Fervor. Breath of Fury keeps the momentum rolling by sacrificing its host, untapping your entire board, and chaining together infinite combat phases. Meanwhile, Utopia Mycon plays a vital dual role: it provides a steady stream of extra fodder and can sacrifice those excess Saprolings to fund Rith's hefty mana tax, keeping the loop entirely self-sustaining.