Exhume, Dualcaster Mage, and Bloodflow Connoisseur

Prerequisites

• Exhume in hand
• Dualcaster Mage in hand
• Bloodflow Connoisseur on the battlefield
• available

Steps

1. Cast Exhume by paying its mana cost Holding priority, cast Dualcaster Mage by paying its mana cost
2. When Dualcaster Mage enters, it triggers, targeting Exhume
3. Holding priority, activate Bloodflow Connoisseur by sacrificing Dualcaster Mage
4. Resolve the Dualcaster Mage trigger, copying Exhume Resolve the Exhume copy, returning Dualcaster Mage from your graveyard to the battlefield
5. Repeat from step 3

Results

• Infinite magecraft triggers
• Infinite +1/+1 counters on a creature
• Infinite creature LTB
• Infinite creature ETB
• Infinite death triggers
• Each opponent returns all creature cards from their graveyard to the battlefield
• Infinite creature sacrifice triggers