Rith, the Awakener + Breath of Fury + Phyrexian Altar + Urabrask the Hidden

Prerequisites

• There are at least four permanents of any color on the battlefield.
• Breath of Fury attached to any creature you control except Rith or Urabrask the Hidden.
• An opponent cannot block creatures you control.

Steps

1. 1Deal combat damage using Rith and the creature with Breath of Fury attached, triggering Rith and Breath of Fury.
2. 2Resolve the Rith trigger, causing you to pay to create at least four 1/1 Saproling creature tokens.
3. 3Resolve 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. 4Move 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. 5Holding priority, activate Phyrexian Altar three times by sacrificing three Saprolings, adding .
6. 6Repeat from step 2.

Effects

• Infinite colored mana
• Infinite combat damage
• Infinite combat phases
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens with haste
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control