Skittering Precursor, Sword of the Meek, Ruination Guide, and Extruder

Prerequisites

• Skittering Precursor on the battlefield
• Sword of the Meek on the battlefield
• Ruination Guide on the battlefield
• Extruder on the battlefield

Steps

1. Activate Extruder 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 Ruination Guide, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Eldrazi Spawn
4. Resolve the Extruder ability, putting a +1/+1 counter on a creature you control
5. Repeat

Results

• Infinite +1/+1 counters
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers