Curator Beastie, Lesser Masticore, and Lithatog

Prerequisites

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

Steps

1. Activate Lithatog's first ability 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 Lithatog ability, giving it +1/+1 until end of turn
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinitely large Lithatog until end of turn