Rith, the Awakener + Breath of Fury + Phyrexian Altar + Fervor

Rith, the Awakener

Breath of Fury

Phyrexian Altar

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 Phyrexian Altar three times by sacrificing three Saprolings, adding 2.
6. Repeat from step 2.

This brilliant assault relies on Breath of Fury to chain endless combat phases by leaping from creature to creature, untapping your entire board along the way. While Fervor ensures your newly minted tokens can immediately charge into battle without waiting around, Rith, the Awakener converts that unblocked combat damage into a massive army of Saprolings by feeding the mana cost of her trigger. To keep the engine sustained, Phyrexian Altar quietly transforms those expendable tokens into the exact green mana needed to pay for Rith's ability, creating a self-sustaining loop of endless attacks, sacrifices, and overwhelming board growth.