Retrofitter Foundry, Krark-Clan Ironworks, Clock of Omens, and Worldwalker Helm

Prerequisites

• Retrofitter Foundry on the battlefield
• Krark-Clan Ironworks on the battlefield
• Clock of Omens on the battlefield
• Worldwalker Helm on the battlefield
• available

Steps

1. Activate Retrofitter Foundry's second ability by paying and tapping it, creating a 1/1 Servo artifact creature token plus at least one additional artifact token due to Worldwalker Helm Activate Clock of Omens by tapping two artifact tokens, untapping Retrofitter Foundry
2. Activate Krark-Clan Ironworks by sacrificing an artifact token, adding
3. Repeat any number of times
4. Once you have infinite tapped artifact tokens, you may activate Krark-Clan Ironworks any number of times by sacrificing any number of them, adding infinite colorless mana
5. Once you have infinite mana, you may use Retrofitter Foundry's first ability to untap it and get infinite untapped artifact creature tokens
6. Once you have infinite untapped artifacts, you may activate Clock of Omens any number of times to untap any number of artifacts infinite times

Results

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite artifact tokens
• Infinite creature LTB
• Infinite creature ETB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite colorless mana
• Infinite creature tokens
• Infinite mana artifacts you control can produce
• Infinite untap of artifacts you control