Lonis, Genetics Expert + Grinding Station + Double Major Combo

Grinding Station on the battlefield.

Double Major in hand.

Lonis in hand or in the command zone.

You control at least one Clue token.

plus enough mana to pay for commander tax, if applicable available

Cast Lonis either from your hand or from the command zone by paying plus commander tax, if applicable.

Holding priority, cast Double Major by paying , creating a nonlegendary copy of the Lonis spell.

Resolve both Lonis spells.

Activate Grinding Station by tapping it and sacrificing a Clue.

Lonis and the Lonis token's second abilities trigger.

Resolve the nontoken Lonis trigger, putting a +1/+1 counter on the token Lonis.

The token Lonis's first ability triggers, creating a Clue artifact token.

When the Clue enters the battlefield, Grinding Station triggers, untapping Grinding Station.

Resolve the token Lonis's trigger from step 2, putting a +1/+1 counter on the nontoken Lonis.

The nontoken Lonis's first ability triggers, creating a Clue artifact token.

When the Clue enters the battlefield, Grinding Station triggers, untapping Grinding Station.

Resolve the Grinding Station ability.

Repeat from step 4.

Infinite artifact tokens

Infinite mill

Infinite self-mill

Infinite Clue tokens

Infinite +1/+1 counters on creatures you control