Kill all the monsters you see in the Labyrinth Forest. When you are finished, "the path to
the castle" is open and you will be able to get to the place you need to go.

I used a leaf to get out of the dungeon. Do I have to kill the monsters again to get out
of the labyrinth and back to Heim?

As I remembered, there are three Isilla-type monster in the forest. Kill all of them and
the portal to Glast Heim will show up.

the second time you enter the labyrinth, the monsters you have defeated from before
wouldn't be there... regardless... easy directions to glast heim... once you enter the
labyrinth... warp your way to the left three times until you reach the area with four
direction going north, east, west , and south... head north, you've finally reached your
destination lol... easy step... (warp point direction)... LEFT<LEFT<LEFT< and
UP!!!... good luck guys!!!

You have to kill all the Isillas, before the path have been shown to you by the Spirit of
the Forest. It is hard to find out where those monsters are. Be careful ;]

Just 3