Teshar, Ancestor's Apostle, Yahenni, Undying Partisan, and Dream Stalker

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Dream Stalker in the graveyard

Steps

1. Cast an artifact in your hand by paying
2. Teshar triggers, returning Dream Stalker from your graveyard to the battlefield
3. When Dream Stalker 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 Dream Stalker Repeat

Results

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