Karmic Guide, Reveillark, and Fanatical Devotion

Prerequisites

• Karmic Guide on the battlefield
• Reveillark on the battlefield
• Fanatical Devotion on the battlefield
• There is at least one other creature on the battlefield

Steps

1. Activate Fanatical Devotion by sacrificing Karmic Guide, regenerating target creature
2. Activate Fanatical Devotion by sacrificing Reveillark
3. When Reveillark dies, it triggers, returning Karmic Guide from your graveyard to the battlefield
4. When Karmic Guide enters the battlefield, it triggers, returning Reveillark from your graveyard to the battlefield
5. Resolve the Fanatical Devotion ability from step 2, regenerating target creature
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite scry 1