All permanents on the battlefield (Gauntlets of Light attached to Romana II).
Romana II does not have summoning sickness.
There and Back Again has exactly two lore counters on it.
({1} magic symbol) available.
Steps
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 Romana II by paying ({1} magic symbol) and tapping it, creating a token copy of Smaug with haste.
Put either Smaug token into your graveyard due to the legend rule.
When the Smaug token dies, it triggers, creating fourteen Treasure tokens.
Activate four Treasures by tapping and sacrificing them, adding ({3} magic symbol) ({W} magic symbol) .
Activate Gauntlets of Light by paying ({2} magic symbol) ({W} magic symbol) , untapping Romana II.