There and Back Again | Blade of Shared Souls | Flamewright

(and one other card)

At the beginning of your precombat main phase,
There and Back Again triggers, putting a lore counter on it.
There and Back Again's third chapter ability triggers, creating a legendary 6/6 Smaug creature token and causing you to sacrifice
There and Back Again.
Activate
Flamewright's first ability by paying ({1} magic symbol) and tapping it, creating a 1/1 Construct creature token.
Activate
Blade of Shared Souls' equip ability by paying ({2} magic symbol) , attaching it to the Construct token.
Blade of Shared Souls triggers, causing the Construct to become a copy of Smaug for as long as
Blade of Shared Souls is attached to it.
Put the Construct token into your graveyard due to the legend rule.
When the Construct dies, it triggers, creating fourteen Treasure artifact tokens.
Activate six Treasures by tapping and sacrificing them, adding ({6} magic symbol) .
Activate
Flamewright by paying ({3} magic symbol) and untapping it, giving itself +2/+2 until end of turn.
Repeat from step 3.
Once you have infinite mana, you may simply tap and untap
Flamewright to get infinite Construct tokens, and then use its second ability to sacrifice them for infinite damage.