Karn, Legacy Reforged, Strionic Resonator, Clock of Omens, Staff of Domination, and Basalt Monolith

Prerequisites

• Karn, Legacy Reforged on the battlefield
• Strionic Resonator on the battlefield
• Clock of Omens on the battlefield
• Staff of Domination on the battlefield
• Basalt Monolith on the battlefield
• You control at least two additional artifacts
• available

Steps

1. At the beginning of your upkeep, Karn triggers
2. Holding priority, activate Strionic Resonator by paying and tapping it, copying Karn's ability
3. Resolve the copy of Karn's ability, adding for each artifact you control that cannot be spent to cast nonartifact spells
4. Activate Clock of Omens by tapping Staff of Domination and Basalt Monolith, untapping Strionic Resonator
5. Activate Staff of Domination's first ability by paying , untapping it
6. Activate Basalt Monolith's second ability by paying , untapping it
7. Repeat from step 2

Results

• Infinite colorless mana that cannot be spent to cast nonartifact spells
• Infinite mana artifacts you control can produce
• Infinite untap of artifacts you control