You can go to this dungeon through the north exit on Pearloats Pasture.
You need to have an ability to destroy giant rock to be able to fully explore this dungeon (you also need silver flame and dash ability, however you must already have them when you reach this ruins).
You need silver flame ability to reveal the path shown on the picture above (Gaferis Ruins B1, northwestern area).
You can go pass through the jailed path by using Dezel’s dash ability.
Located on Gaferis Ruins B2, on the large area with a lot of coffins.
To be able to reach this area, you need to have an earth ability first (destroy rock). Go to B2 and find the path that can be destroyed by the earth ability, and then follow the path until you find this Normin.
Located on Gaferis Ruins B2, same room where you found the monolith (status ailments).