({1} magic symbol) ({U} magic symbol) plus an additional ({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.
Activate
Marvin by paying ({1} magic symbol) ({U} magic symbol) , blinking it.
When
Marvin enters,
Deadeye Navigator triggers, repairing it and
Marvin.
Repeat each turn.
Results
Infinite turns.
Metadata
This combo produces a lock.
In 12 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).