Nardole by tapping it, adding at least ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) that can only be spent to cast noncreature spells.
Cast
Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) .
Chakram Retriever triggers, untapping
Nardole.
Resolve
Clockspinning, putting a counter on
Nardole, or putting/removing a counter from any other permanent you control, and then returning
Clockspinning to your hand.
Repeat.
Once you have infinite ({U} magic symbol) that can only be spent to cast noncreature spells, you may target any other creature using
Chakram Retriever's trigger.
Results
Infinite magecraft triggers.
Infinite mana creatures you control can produce.
Infinite proliferate.
Infinite storm count.
Infinite untap of creatures you control.
Metadata
In 12 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).