Cavalier of Night, Paleontologist's Pick-Axe // Dinosaur Headdress, Priest of Gix, and Evereth, Viceroy of Plunder

Prerequisites

• Cavalier of Night in exile
• Paleontologist's Pick-Axe // Dinosaur Headdress on the battlefield
• Priest of Gix on the battlefield
• Evereth, Viceroy of Plunder on the battlefield
• available

Steps

1. Activate Dinosaur Headdress' equip ability by paying , attaching it to Priest of Gix and causing Priest of Gix to become a copy of Cavalier of Night
2. Activate Evereth by sacrificing Priest of Gix
3. When Priest of Gix dies, its second ability triggers, returning itself from your graveyard to the battlefield
4. When Priest of Gix enters the battlefield, it triggers, adding
5. Resolve the Evereth ability Repeat

Results

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