Curator Beastie, Lesser Masticore, and Extruder

Prerequisites

• Curator Beastie on the battlefield
• Lesser Masticore on the battlefield
• Extruder on the battlefield
• Lesser Masticore does not have a -1/-1 counter on it

Steps

1. Activate Extruder by sacrificing Lesser Masticore
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it due to Curator Beastie
3. Resolve the Extruder ability, putting a +1/+1 counter on a creature you control
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters