Black Carriage, and Splinter Twin

Prerequisites

• Black Carriage on the battlefield
• Splinter Twin on the battlefield

Steps

1. During your upkeep, activate Black Carriage by tapping it, creating a token copy of itself with haste
2. Activate the nontoken Black Carriage by sacrificing the token Black Carriage, untapping the nontoken Black Carriage
3. Repeat

Results

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