Mutagen Man, Living Ooze, Basalt Monolith, and Cogwork Assembler

Prerequisites

• Mutagen Man, Living Ooze on the battlefield
• Basalt Monolith in hand
• Cogwork Assembler on the battlefield
• available

Steps

1. Activate Cogwork Assembler by paying , creating a token copy of Basalt Monolith
2. Activate the Basalt Monolith token's first ability by tapping it, adding
3. Activate the Basalt Monolith token's second ability by paying due to Mutagen Man, untapping it
4. Repeat from step 2

Results

• Infinite colorless mana
• Infinite copies of artifacts you control with haste