Skittering Precursor, Sword of the Meek, Weapons Trainer, and Umbral Collar Zealot

Prerequisites

• Skittering Precursor on the battlefield
• Sword of the Meek on the battlefield
• Weapons Trainer on the battlefield
• Umbral Collar Zealot on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing Sword of the Meek
2. Skittering Precursor triggers, creating a 0/1 Eldrazi Spawn creature token
3. When the Eldrazi Spawn enters the battlefield as a 1/1 due to Weapons Trainer, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Eldrazi Spawn
4. Resolve the Umbral Collar Zealot ability Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana
• Infinite creature tokens
• Infinite surveil 1