Nim Deathmantle + Ashnod's Altar + Xorn + Plundering Barbarian

Prerequisites

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Steps

1. 1Activate Ashnod's Altar by sacrificing Plundering Barbarian, adding .
2. 2Plundering Barbarian dies, triggering Nim Deathmantle, causing you to pay to return Plundering Barbarian from your graveyard to the battlefield, and attach Nim Deathmantle to it.
3. 3Plundering Barbarian enters the battlefield, creating two Treasure tokens.
4. 4Activate two Treasure tokens by tapping and sacrificing those, adding two mana of any color.
5. 5Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers