Replication Specialist, Guardians of Koilos, Dross Scorpion, Dutiful Replicator, and Ashnod's Altar

Prerequisites

• Replication Specialist on the battlefield
• Guardians of Koilos in hand
• Dross Scorpion on the battlefield
• Dutiful Replicator in hand
• Ashnod's Altar on the battlefield
• You control a mana-producing artifact that can tap to produce at least
• available

Steps

1. Cast Guardians of Koilos by paying
2. When Guardians of Koilos enters the battlefield, it and Replication Specialist trigger
3. Resolve the Replication Specialist trigger, causing you to pay to create a token copy of Guardians of Koilos
4. When the token Guardians of Koilos enters the battlefield, it triggers
5. Resolve both Guardians of Koilos triggers, choosing to return nothing to your hand from the battlefield
6. Cast Dutiful Replicator by paying
7. When Dutiful Replicator enters the battlefield, it and Replication Specialist trigger
8. Holding priority, activate a mana-producing artifact by tapping it, adding at least
9. Resolve the Replication Specialist trigger, causing you to pay to create a token copy of Dutiful Replicator
10. When the token Dutiful Replicator enters the battlefield, it triggers, causing you to pay to create a token copy of the Guardians of Koilos token
11. When the Guardians of Koilos token enters the battlefield, it triggers, choose to return nothing to your hand from the battlefield
12. Activate Ashnod's Altar by sacrificing the Dutiful Replicator token and the Guardians of Koilos token, adding
13. When the tokens die, Dross Scorpion triggers twice
14. Resolve the first trigger, untapping the mana-producing artifact
15. Activate the artifact by tapping it, adding at least
16. Repeat steps 14 and 15 one additional time
17. Resolve the nontoken Dutiful Replicator trigger from step 7, causing you to pay to create a token copy of Guardians of Koilos
18. When the Guardians of Koilos token enters the battlefield, it triggers, returning the nontoken Dutiful Replicator from the battlefield to your hand
19. Activate Ashnod's Altar by sacrificing the Guardians of Koilos token, adding
20. When the token dies, Dross Scorpion triggers, untapping the mana-producing artifact
21. Repeat from step 6
22. Once you have infinite blue and/or colorless mana, you may forego sacrificing the creature tokens

Results

• Infinite blue mana
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count