Bartolomé del Presidio, Feign Death, and Dualcaster Mage

Prerequisites

• Bartolomé del Presidio on the battlefield
• Feign Death in hand
• Dualcaster Mage in hand
• available

Steps

1. Cast Feign Death by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost
3. When Dualcaster Mage enters, it triggers, copying Feign Death, with the copy targeting Dualcaster Mage
4. Resolve the copy of Feign Death
5. Holding priority, activate Bartolomé del Presidio by sacrificing Dualcaster Mage
6. When Dualcaster Mage dies, it triggers, returning it from your graveyard to the battlefield
7. Repeat from step 3
8. Resolve all Bartolomé del Presidio abilities from step 5

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers
• Infinite +1/+1 counters on Bartolomé del Presidio