Dune-Brood Nephilim, Hellkite Charger, and Phyrexian Altar

Prerequisites

• Dune-Brood Nephilim on the battlefield
• Hellkite Charger on the battlefield
• Phyrexian Altar on the battlefield
• Dune-Brood Nephilim does not have summoning sickness
• An opponent is unable to block Hellkite Charger and Dune-Brood Nephilim
• You control at least eight lands

Steps

1. Declare Dune-Brood Nephilim and Hellkite Charger as attackers
2. Hellkite Charger triggers, causing you to pay to untap all attacking creatures you control and to get an additional combat phase after this one
3. Deal combat damage with Dune-Brood Nephilim
4. Dune-Brood Nephilim triggers, creating a 1/1 Sand creature token for each land you control
5. Move to your next combat phase
6. Declare Dune-Brood Nephilim and Hellkite Charger as attackers
7. Hellkite Charger triggers, holding priority, activate Phyrexian Altar seven times by sacrificing seven Sand creature tokens, adding
8. Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures you control and to get an additional combat phase after this one
9. Repeat from step 3

Results

• Infinite colored mana
• Infinite combat damage
• Infinite combat phases
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers