Yomiji, Who Bars the Way, Mox Opal, and Krark-Clan Grunt

Prerequisites

• Yomiji, Who Bars the Way on the battlefield
• Mox Opal on the battlefield
• Krark-Clan Grunt on the battlefield

Steps

1. Activate Krark-Clan Grunt by sacrificing Mox Opal
2. Yomiji triggers, returning Mox Opal from your graveyard to your hand
3. Resolve the Krark-Clan Grunt ability
4. Cast Mox Opal by paying
5. Repeat
6. If you control at least one additional artifact, you may also activate Mox Opal once per loop, resulting in infinite colored mana

Results

• Infinite colored mana
• Infinite storm count
• Infinitely powerful Krark-Clan Grunt until end of turn