Larian Studios Forums Divine Divinity (English) Help/Tips/Tricks Iona's dungeon monster

I went all the way to the bottom of Iona's dungeon and defeated the monster there (don't remember its name). I found a locked chest in the cavern and no way to unlock it or pick it. Is the monster supposed to drop a key or something?

There is a skull on top of the chest; drag and drop in into your inventory, then click on the chest again...