Teshar, Ancestor's Apostle, Scrap Trawler, Umbral Collar Zealot, and Lotus Petal

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Scrap Trawler in the graveyard
• Umbral Collar Zealot on the battlefield
• Lotus Petal in hand

Steps

1. Cast Lotus Petal by paying its mana cost
2. Teshar triggers, returning Scrap Trawler from your graveyard to the battlefield
3. Activate Lotus Petal by tapping and sacrificing it
4. Activate Umbral Collar Zealot by sacrificing Scrap Trawler
5. When Scrap Trawler dies, it triggers, returning Lotus Petal from your graveyard to your hand
6. Resolve the Umbral Collar Zealot ability
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite surveil 1