Errant and Giada, Mortuary, Ashnod's Altar, and Brass Gnat

Prerequisites

• Errant and Giada on the battlefield
• Mortuary on the battlefield
• Ashnod's Altar on the battlefield
• Brass Gnat on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Brass Gnat, adding
2. When Brass Gnat dies, Mortuary triggers, putting Brass Gnat on top of your library from your graveyard
3. Cast Brass Gnat from the top of your library by paying
4. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count