Arcbound Reclaimer, Mystic Forge, Arcbound Worker, and Ashnod's Altar

Prerequisites

• Arcbound Reclaimer on the battlefield
• Mystic Forge on the battlefield
• Arcbound Worker on the battlefield
• Ashnod's Altar on the battlefield
• Arcbound Worker has at least one +1/+1 counter on it

Steps

1. Activate Ashnod's Altar by sacrificing Arcbound Worker, adding
2. Arcbound Worker dies, triggering its modular ability, moving its +1/+1 counters onto Arcbound Reclaimer
3. Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Arcbound Worker on top of your library from your graveyard
4. Cast Arcbound Worker from the top of your library by paying
5. Arcbound Worker enters the battlefield with a +1/+1 counter on it due to its modular ability
6. Repeat

Results

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