Teshar, Ancestor's Apostle, Yahenni, Undying Partisan, and Stickytongue Sentinel

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Stickytongue Sentinel in the graveyard

Steps

1. Cast an artifact in your hand by paying
2. Teshar triggers, returning Stickytongue Sentinel from your graveyard to the battlefield
3. When Stickytongue Sentinel enters, it triggers, returning another artifact that can be cast for from the battlefield to your hand
4. Resolve the artifact spell cast in step 1
5. Activate Yahenni by sacrificing Stickytongue Sentinel Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite storm count