Sky Realms Online book 6 - Onyxgate

The sixth and final book of the Skyrealms series by Troy Osgood (https://aethonbooks.com/book-author/troy-osgood/)
Check out the collection here: https://www.amazon.com/Onyxgate-Realms-Online-Book-LitRPG/dp/B0B3RR5SYW
The reviews are great, it's got a decent ending !
Previous books:
https://www.artstation.com/artwork/8l8oxQ
https://www.artstation.com/artwork/oONqaz
https://www.artstation.com/artwork/GXAYPz
https://www.artstation.com/artwork/mD0o88
https://www.artstation.com/artwork/oARKnJ