Emry, Lurker of the Loch, Mirran Spy, and Lion's Eye Diamond

Prerequisites

• Emry, Lurker of the Loch on the battlefield
• Mirran Spy on the battlefield
• Lion's Eye Diamond in the graveyard

Steps

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

Results

• Infinite colored mana
• Infinite storm count