Slagstone Refinery + March of the Machines + Sword of the Meek + Ashnod's Altar + Master of Etherium

Prerequisites

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Steps

1. 1Activate Ashnod's Altar by sacrificing Sword of the Meek, adding .
2. 2Sword of the Meek dies, triggering Slagstone Refinery, creating a tapped Powerstone token that enters the battlefield as a 1/1 creature due to March of the Machines and Master of Etherium.
3. 3Sword of the Meek triggers, returning itself from your graveyard to the battlefield, but not attaching itself to the Powerstone due to Sword of the Meek becoming a creature.
4. 4Repeat.

Effects

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite tapped creature tokens
• Infinite tapped Powerstone tokens