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

Prerequisites

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

Steps

1. Activate Krark-Clan Grunt by sacrificing Mox Amber
2. Yomiji triggers, returning Mox Amber from your graveyard to your hand
3. Resolve the Krark-Clan Grunt ability
4. Cast Mox Amber by paying
5. Activate Mox Amber by tapping it, adding one mana of any color among legendary creatures or planeswalkers you control
6. Repeat

Results

• Infinite storm count
• Infinite mana among colors of legendary creatures and planeswalkers you control
• Infinitely powerful Krark-Clan Grunt until end of turn