There and Back Again has exactly two lore counters on it.
You control a Smaug token, or you control five additional artifacts.
({1} magic symbol) ({BP} magic symbol) the first turn, with ({1} magic symbol) ({BP} magic symbol) available the second turn if you do not control a Smaug token available.
Steps
At the beginning of your precombat main phase, There and Back Again triggers, putting a lore counter on it, triggering its third chapter ability.
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 a Smaug dies this way, it triggers, creating fourteen Treasure tokens.
Activate Time Sieve by tapping it and sacrificing five other artifacts, causing you to take an extra turn after this one.