Captain Storm, Cosmium Raider, Lesser Masticore, Ashnod's Altar, and Maskwood Nexus

Prerequisites

• Captain Storm, Cosmium Raider on the battlefield
• Lesser Masticore on the battlefield
• Ashnod's Altar on the battlefield
• Maskwood Nexus on the battlefield
• Lesser Masticore does not have a -1/-1 counter on it

Steps

1. Activate Ashnod's Altar by sacrificing Lesser Masticore, adding
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When Lesser Masticore enters the battlefield, Captain Storm triggers, putting a +1/+1 counter on Lesser Masticore
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana