Mogle Treasure Trove The Hunt for Goetia

[Fatch38]

You can also just solo some group maps as blue mage to finish it.

still can't read what the game is asking you, it's open a map + get a portal + complete that portal by killing the last room boss. anyone who have done maps in its life know that going to the last room is so rng heavy that's it's unlikely to happen in hundreds of maps.