Karn, Legacy Reforged + Lithoform Engine + Clock of Omens + Staff of Domination + Grim Monolith

Prerequisites

• You control at least three additional artifacts.

Steps

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

Effects

• Infinite card draw
• Infinite colorless mana
• Infinite colorless mana that can't be spent to cast nonartifact spells
• Infinite draw triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite mana artifacts you control can produce
• Infinite mana creatures you control can produce
• Infinite untap of artifacts you control
• Infinite untap of creatures you control