The vial of blood is in the secret room, but not in a chest, just sitting on a table, or something (it looks a bit like a candle at first glance).
The locked chest in one of the other rooms can be opened with a key in the same room. Check on and beside the beds, etc; the keys shouldn't be too hard to find. There is nothing essential in any chests that need Lockpick. You can come back for any you can not open, but I don't recall getting anything that great there (reloaded a few times on Amdusias' password protected chest to get something decent).
BTW when you finish off Amdusias you will get access to Sentinel Island. Your first encounter there you can mindread to go up a level, so the higher level you are (I made it to level 18 in the fjords) the more of an experience bonus that will be. You don't need to get to a high level, but it would be better if you got to a new level before entering, to get a full level bonus.
You can get to the fjords from a path to the far south west in Broken Valley.
The
Killer Rabbit is level 22, so is difficult if you are still in Broken Valley. It is triggered by killing 20 rabbits, and can best be defeated by jumping onto a rock or into a river, where it can not get to you, and using a ranged attack. You can avoid killing rabbits (ie don't use any proximity based damage auras, such as poison) and wait until you are a higher level in the fjords, since you only need 2 to trigger it (there are not as many rabbits there, so some people who didn't kill many in Broken Valley had trouble finding enough in the fjords).
There is a D2:ED
walkthrough,
guide (with screenshots) and
Divinity 2 Wiki, as well as Lancet's
Divinity 2: Ego Draconis All-Purpose Guide. Of course you can also post in the forum if you want to avoid spoilers, etc.
