Eternal Witness, Sevinne's Reclamation, Phyrexian Altar, Pitiless Plunderer, and Ogre Slumlord

Prerequisites

• Eternal Witness in the graveyard
• Sevinne's Reclamation in hand
• Phyrexian Altar on the battlefield
• Pitiless Plunderer on the battlefield
• Ogre Slumlord on the battlefield
• available

Steps

1. Cast Sevinne's Reclamation by paying , returning Eternal Witness to the battlefield
2. Eternal Witness enters the battlefield, returning Sevinne's Reclamation from your graveyard to your hand
3. Activate Phyrexian Altar by sacrificing Eternal Witness, adding
4. Pitiless Plunderer and Ogre Slumlord triggers
5. Resolve the Pitiless Plunderer, creating a Treasure token
6. Resolve the Ogre Slumlord trigger, creating a 1/1 Rat creature token
7. Activate a Treasure token by tapping and sacrificing it, adding one mana of any color
8. Activate Phyrexian Altar by sacrificing a Rat token, adding one mana of any color
9. Pitiless Plunderer triggers, creating a Treasure token
10. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count
• Infinite Treasure tokens