Safana, Calimport Cutthroat, Clock of Omens, Lithoform Engine, and Krark-Clan Ironworks

Prerequisites

• Safana, Calimport Cutthroat on the battlefield
• Clock of Omens on the battlefield
• Lithoform Engine on the battlefield
• Krark-Clan Ironworks on the battlefield
• You have the initiative
• You have completed a dungeon
• available

Steps

1. At the beginning of your end step, Safana triggers
2. Holding priority, activate Lithoform Engine's first ability by paying and tapping it, copying Safana's ability
3. Resolve the copy of Safana's ability, creating three Treasure tokens
4. Activate Clock of Omens by tapping two Treasure tokens, untapping Lithoform Engine
5. Activate Krark-Clan Ironworks by sacrificing a Treasure token, adding
6. Repeat from step 2

Results

• Infinite colored mana
• Infinite colorless mana
• Infinite Treasure tokens
• Infinite untap of artifacts you control