({20} magic symbol) minus ({1} magic symbol) for each creature and artifact you control each turn available.
Steps
Activate
Marvin using
Avatar Kuruk's ability by paying ({20} magic symbol) minus ({1} magic symbol) for each creature and/or artifact you can tap while activating it, causing you to take an extra turn after this one.
At the beginning of your end step,
The Mind Stone triggers, blinking
Marvin.
Repeat each turn.
Results
Infinite turns.
Metadata
This combo produces a lock.
In 0 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).