Cauldron of Essence, Dross Scorpion, Phyrexian Altar, and Triplicate Titan

Prerequisites

• Cauldron of Essence on the battlefield
• Dross Scorpion on the battlefield
• Phyrexian Altar on the battlefield
• Triplicate Titan on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Triplicate Titan, adding
2. When Triplicate Titan dies, it and Dross Scorpion trigger
3. Resolve the Triplicate Titan trigger, creating three creature tokens
4. Resolve the Dross Scorpion trigger, untapping Cauldron of Essence
5. Activate Phyrexian Altar twice by sacrificing two creature tokens, adding
6. When the creatures die, Dross Scorpion triggers twice, untapping two artifacts
7. Activate Cauldron of Essence by paying , tapping it and sacrificing another creature
8. When the creature dies, Cauldron of Essence triggers, and Dross Scorpion triggers if the creature was an artifact
9. Resolve the Cauldron of Essence trigger, causing you to gain 1 life and each opponent to lose 1 life
10. Resolve the Dross Scorpion trigger, if applicable, untapping an artifact
11. Resolve the Cauldron of Essence ability from step 7, returning Triplicate Titan from your graveyard to the battlefield
12. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite mana artifacts you control can produce
• Infinite sacrifice triggers
• Infinite untap of artifacts you control