Can't find the white dripstone in Synto Farm

I got the red and blue one, but I can't get the white one.

Well, there is an area in the southwest where I have not been there yet, but I don't find any way to it.
I have been trying all teleporters, looking for secret walls... no way.

Does anybody
know
how to get there?

I think there was a teleport or something that gets you to that area. It's been a while since I played.

I can see 7 teleporters on the map, been trying every one of them, none of them takes me to that enclosed area.
That area is close to a teleporter in the southwest but there is a hole in the floor.

Post at catacomber.com in the Game forum under Hero of Lukomorye IV section.