Its possible? *spoiler*

[Nurago]

Hello! guys, Im doing the gatekeeper quest, in one of the last points. I already killed the magician leader, took the dragon key, beat the two hell ghoul in the room, I beat the three hell skeletons.Now I find myself in the room with the four undead servents, but I realized I have a few potions, both now and for when i will meet the dragons. my question is: can I go in the pier of the island, back to mithria and buy other potions? and finally return to the gateway and in the other dimension to finish the quest? or if I go out from other demension, I cant go back there again because the gateway will close and to complete it? thanks in advance for the answers!

[Prickett]

I think you should be able to return. Just save before you go back, just in case you can't.