Triskelion, and Scythe of the Wretched

Prerequisites

• Triskelion on the battlefield
• Scythe of the Wretched on the battlefield
• Scythe of the Wretched attached to Triskelion
• Triskelion has at least three +1/+1 counters on it

Steps

1. Activate Triskelion's ability by removing a +1/+1 counter from it to deal 1 damage to itself
2. Repeat step 1 an additional 2 times, killing Triskelion
3. Scythe of the Wretched triggers, returning Triskelion to the battlefield with Scythe of the Wretched attached to it
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB