Here Be Monsters is a main quest available in Final Fantasy XVI.
Your objective is to prepare to set sail for Drake’s Breath.
Here’s a walkthrough and guide of Here Be Monsters in Final Fantasy 16.
Speak with Vivian
First of all, speak with Vivian to ask her on Drake’s Breath.
Talk to Jill
Next, talk to Jill when you’re ready to leave for the next Mothercrystal.
Head to Drustanus
Use the world map to travel to Drake’s Breath in Drustanus.
The quest ends when you reach the area.