There and Back Again | Clockspinning

Cards

({9} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) available.

At the beginning of your precombat main phase,
There and Back Again triggers, putting a lore counter on it and triggering its third chapter ability.
Holding priority, cast
Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) , removing a lore counter from
There and Back Again and returning
Clockspinning to your hand.
Resolve the
There and Back Again ability, creating a 6/6 Smaug legendary creature token.
Cast
Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) , putting a lore counter from
There and Back Again and returning
Clockspinning to your hand.
There and Back Again's third chapter ability triggers. Holding priority, cast
Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) , removing a lore counter from
There and Back Again and returning
Clockspinning to your hand.
Resolve the
There and Back Again ability, creating a 6/6 Smaug legendary creature token.
Put either Smaug into your graveyard due to the legend rule. The Smaug that dies triggers, creating fourteen Treasure tokens.
Activate eight Treasure tokens by tapping and sacrificing them, adding ({6} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Repeat from step 4.

Once you have infinite mana, you can cast
Clockspinning infinitely to trigger
There and Back Again's first and/or second chapter abilities as many times as desired.

This combo has been estimated to be Core (Bracket 2+).