Splinter Twin, and Derevi, Empyrial Tactician

Prerequisites

• Splinter Twin on the battlefield
• Derevi, Empyrial Tactician on the battlefield
• Splinter Twin attached to Derevi
• Derevi does not have summoning sickness

Steps

1. Activate Derevi, putting a token copy of Derevi onto the battlefield
2. The token copy is put into your graveyard due to the legend rule
3. The token copy's enter the battlefield ability triggers, untapping Derevi
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB