Divinity 2 is running on Elder Scrolls engine.
I suppose to be slightly pedantic* it's not actually the same engine as Oblivion, but both use Gamebryo and have enough commonality that similar modding tools can be employed for certain tasks with only minimal adaptation.
I slightly miss the wobbly old Gamebryo engine but it is a bit long in the tooth and the newer Original Sin one has more mileage in it, even if it does use horrid GR2 files.
* this is of course a guarantee that anything I've said is of likely questionable accuracy, as inevitably happens with pedantry.
