Lonis, Genetics Expert, Grinding Station, and Double Major

Prerequisites

• Lonis, Genetics Expert in hand or in the command zone
• Grinding Station on the battlefield
• Double Major in hand
• You control at least one Clue token
• plus enough mana to pay for commander tax, if applicable available

Steps

1. Cast Lonis either from your hand or from the command zone by paying plus commander tax, if applicable
2. Holding priority, cast Double Major by paying , creating a nonlegendary copy of the Lonis spell
3. Resolve both Lonis spells
4. Activate Grinding Station by tapping it and sacrificing a Clue
5. Lonis and the Lonis token's second abilities trigger
6. Resolve the nontoken Lonis trigger, putting a +1/+1 counter on the token Lonis
7. The token Lonis's first ability triggers, creating a Clue artifact token
8. When the Clue enters the battlefield, Grinding Station triggers, untapping Grinding Station
9. Resolve the token Lonis's trigger from step 2, putting a +1/+1 counter on the nontoken Lonis
10. The nontoken Lonis's first ability triggers, creating a Clue artifact token
11. When the Clue enters the battlefield, Grinding Station triggers, untapping Grinding Station
12. Resolve the Grinding Station ability
13. Repeat from step 4

Results

• Infinite mill
• Infinite self-mill
• Infinite +1/+1 counters
• Infinite Clue tokens