Blade of Shared Souls, Flamewright, Staff of Domination, and There and Back Again Combo

Prerequisites

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 and tapping it, creating a 1/1 Construct creature token
Activate Blade of Shared Souls' equip ability by paying , 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 seven Treasures by tapping and sacrificing them, adding
Activate Staff of Domination's third ability by paying and tapping it, untapping Flamewright
Activate Staff of Domination's first ability by paying , untapping it
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
You may also use the mana to activate any of Staff of Domination's abilities