Emry, Lurker of the Loch, Chakram Retriever, and Lion's Eye Diamond

Prerequisites

• Emry, Lurker of the Loch on the battlefield
• Chakram Retriever on the battlefield
• Lion's Eye Diamond on the battlefield

Steps

1. Activate Emry by tapping it, targeting Lion's Eye Diamond
2. Cast Lion's Eye Diamond from your graveyard by paying
3. Chakram Retriever triggers, untapping Emry
4. Activate Lion's Eye Diamond by sacrificing it
5. Repeat

Results

• Infinite colored mana
• Infinite storm count