Zimone, Quandrix Prodigy, Retreat to Coralhelm, Tiller Engine, and Rakdos Carnarium

Prerequisites

• Zimone, Quandrix Prodigy on the battlefield
• Retreat to Coralhelm on the battlefield
• Tiller Engine on the battlefield
• Rakdos Carnarium in hand
• available

Steps

1. Activate Zimone's first ability by paying and tapping it, putting Rakdos Carnarium from your hand onto the battlefield untapped due to When Rakdos Carnarium enters the battlefield, it, Tiller Engine and Retreat to Coralhelm trigger
2. Resolve the Tiller Engine trigger, untapping Rakdos Carnarium Holding priority, activate Rakdos Carnarium by tapping it, adding
3. Resolve the Rakdos Carnarium trigger from step 2, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Zimone
5. Repeat

Results

• Infinite red mana
• Infinite black mana
• Infinite landfall triggers