Oathkeeper, Takeno's Daisho, Skirk Prospector, and Bureau Headmaster

Prerequisites

• Oathkeeper, Takeno's Daisho on the battlefield
• Skirk Prospector on the battlefield
• Bureau Headmaster on the battlefield

Steps

1. Activate Skirk Prospector by sacrificing the Goblin Samurai, adding
2. When the Goblin Samurai dies, Oathkeeper triggers, returning the Goblin Samurai from your graveyard to the battlefield
3. Activate Oathkeeper's equip ability by paying due to Bureau Headmaster, attaching it to the Goblin Samurai
4. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers