So my co-op partner and I just invaded the Immaculate settlement with Academy and Prison. There is a ton of Tenebrium ore there. There is also a single book called "How to Handle Tenebrium" which provided me an ability to raise Tenebrium Weapons skill, BUT it vanished immediately after I read it! All 4 characters now have Rot, but we also have 2 Blood Stones to use.

- How to make sure everyone gets the ability to use Tenebrium weapons? Are there any books "How to Handle Tenebrium" somewhere else or someone can sell?
- Is there Tenebrium armor skill or are there Tenebrium armors that benefit from Tenebrium Weapon ability or some other Tenebrium Armor ability I haven't discovered yet?
- At which Tenebrium Weapons ability skill level will Rot status go away? Will Rot still be caused by Tenebrium Ore?
- What do I do with all this Tenebrium ore if I don't have the skills to craft anything with it? Should I sell it or stash it or something else?

All in all my co-op buddy and I want to have the Tenebrium weapons ability skill to use Tenebrium weapons, BUT also want to get rid of Rot and prevent us from getting Rot at any point! We got to figure out what to do with Tenebrium ore too!!! How can we accomplish this?