Captain Storm, Cosmium Raider, Lesser Masticore, Krark-Clan Grunt, and Maskwood Nexus

Prerequisites

• Captain Storm, Cosmium Raider on the battlefield
• Lesser Masticore on the battlefield
• Krark-Clan Grunt on the battlefield
• Maskwood Nexus on the battlefield
• Lesser Masticore does not have a -1/-1 counter on it

Steps

1. Activate Krark-Clan Grunt 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
3. When Lesser Masticore enters the battlefield, Captain Storm triggers, putting a +1/+1 counter on Lesser Masticore
4. Resolve the Krark-Clan Grunt ability
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinitely powerful Krark-Clan Grunt until end of turn