There and Back Again has exactly two lore counters on it.
Freed from the Real attached to Satsuki.
Satsuki does not have summoning sickness.
({1} magic symbol) ({BP} magic symbol) , plus an additional ({1} magic symbol) ({U} magic symbol) ({BP} magic symbol) available if you do not control a Smaug token available.
Steps
Activate Satsuki by tapping it, putting a lore counter on There and Back Again.
There and Back Again's third chapter ability triggers.
Holding priority, activate Hex Parasite by paying ({1} magic symbol) ({BP} magic symbol) , removing a lore counter from There and Back Again and giving Hex Parasite +1/+0 until end of turn.
Resolve the There and Back Again ability, creating a legendary 6/6 Smaug creature token.
If you control two Smaugs, put one into your graveyard due to the legend rule.
If you do, the Smaug that died triggers, creating fourteen Treasure tokens.
If you made Treasures this way, activate three Treasures by tapping and sacrificing them, adding ({1} magic symbol) ({U} magic symbol) ({B} magic symbol) .
Activate Freed from the Real's second ability by paying ({U} magic symbol) , untapping Smaug.
Repeat.
Results
Infinite colored mana.
Infinite death triggers.
Infinite ETB.
Infinite LTB.
Infinitely powerful Hex Parasite until end of turn.