Loyal Retainers, Karmic Guide, Bartolomé del Presidio, and Chameleon, Master of Disguise

Prerequisites

• Loyal Retainers on the battlefield
• Karmic Guide on the battlefield
• Bartolomé del Presidio on the battlefield
• Chameleon, Master of Disguise in the graveyard

Steps

1. Activate Loyal Retainers by sacrificing it, returning Chameleon from your graveyard to the battlefield as a copy of Karmic Guide
2. When Chameleon enters the battlefield, it triggers, returning Loyal Retainers from your graveyard to the battlefield
3. Activate Bartolomé del Presidio by sacrificing Chameleon
4. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers