Larian Studios Forums Beyond Divinity (English) Help/Tips/Tricks Key in dark forest from transporting puzzle?

Ok, I don't really know what to call it other than the "dark forest" (the land to the far east with all the fire elementals and such fire elements) i found this transporter there and i had to use my pyramid transporters to get to the left island, where i found a key. Question: what is the key for? And another thing: Where can i find the Blue Larakiri root (spelled something like that)

The key is for a chest in the spider forest, half way up the western edge. For all the work it took to get the key, there is not much in the chest.

The Blue Larakiki Root is in a dead end; head south west of the alchemist's cave, then south east.