Sek'Kuar, Deathkeeper, Cryptolith Rite, Nether Traitor, and Phyrexian Altar

Prerequisites

• Sek'Kuar, Deathkeeper on the battlefield
• Cryptolith Rite on the battlefield
• Nether Traitor on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Nether Traitor, adding one mana of any color
2. Sek'Kuar triggers, creating a 3/1 Graveborn creature token creature with haste
3. Activate the Graveborn token using the ability from Cryptolith Rite by tapping it, adding
4. Activate Phyrexian Altar by sacrificing the Graveborn token, adding one mana of any color
5. Nether Traitor triggers, causing you to pay to return it from your graveyard to the battlefield
6. Activate Nether Traitor using the ability from Cryptolith Rite by tapping it, adding one mana of any color
7. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers