I think Pieh has already given sound advices on the new direction to take for the two blades so below I will just talk about the Li'vah and the Daggers.
On the Li'vah, its current state is not bad in terms of the content. The structure and the write-up, however, is still a bit off-turning. I know you are looking for possible content additions (this will come later, I'm just pointing out what jumps out most at me abt the sub as it is now) more than advice on write-up but I thought it might be useful advice at least to suggest what I think is a more logical way to group content. In the Additional Information section, you're basically describing why Van Torxus created them, how he's using them and what they are doing in the game world but suddenly in the last paragraph, the reader is taken from the game world back into reality where you describe how these creatures can be used in a plot hook. I think it makes more sense for this plot hook paragraph to go by itself under a Roleplaying Use/Plot Hook header. I also suggest that this Plot Hook paragraph be moved to the end after the Magical Abilities.
Now, new idea for the Li'vah, I think a logical place to expand in terms of content is to describe what type of life the Li'vah want for themselves (i.e. do they just want freedom for themselves and they would go onto a peaceful life and be quite harmless to PCs when freed or have they somehow been corrupted by the mindset of their master and now they are bloodthirsty and if released, could be a new type of monster the PCs need to bash up?). Currently, I think I'm getting vibes of the former but I'm not sure. What I'm thinking is either way, you could say they are raiding the villages for their own ulterior motives besides and in addition to why Van Torxes tells them to (I think Manfred already suggested for a previous version of this sub that if the Li'vah just want freedom, they could be raiding to build up resources that support attempts for a revolt. My addition/new spin based on the current version of this sub would be that given that the Li'vah are so in fear of their master, they are not really planning a revolt but couldn't resist piling up resources in the hopes that there might be one eventually). Overall, I think expanding on this aspect, while not able to take it off to any new direction or creating a radical make-up to the sub (personally I don't think this sub needs as complete an overhaul in terms of content as the swords), would give more "life" to the Li'vah whereas currently, the Li'vah are simply written as an attach-on to Van Torxes.
For the daggers, I have the following comments:
1. One aspect that has been questioned by previous comments is the logic of how the daggers were successfully passed onto the conspirators from Van Torxes. This has not been clearly addressed in the current version. You say the daggers are presented as gifts of tribute to the King and the conspirators but are they presented these daggers as a parting gift from Van Torxes or did Van Torxes 'dress up' the daggers as a gift from someone else? Logic would indicate that it is the latter case but as the current sub stands, this is not clear. Also, the sentence "They would pass as gifts from his country of exile" seems weird, I take it to mean that the daggers were presented as gifts to the country who exiled him but still the expression just seems strange to me. One somewhat related pt is that I think one property that should be added to the daggers is that the recipients become attached to these daggers very quickly. Maybe this is implicit in the way you think abt the daggers but this is an 'unexplored aspect' in the current version. The reason I'm raising this pt is b/c I think the daggers might be too powerful if you don't consider the possibility that the recipients don't really care for daggers (even well crafted ones) and might put the daggers into "a corner of the spare storage" where it collects dust. Alternatively, you might say the daggers are auto-relocate themselves so it is always in proximity to the recipients (might hide itself under piles of documents in a cabinet located in the recipients' "office"). Personally, I like the auto-relocation aspect better.
2. This point has already been raised by Forganthus which is how the purpose of creating these daggers relate to the summoning of the Death God. If you really want to keep this aspect, then I could propose some ideas for this link (but I don't know whether that's the direction you want to take it) in the following way:
- being an elf, Van Torxes do not have any magic on his repertoire to exert revenge (subtly) and the only way is to gain this capability is to utilise death magic. To be able to utilise death magic, the only way open to him is to communicate with the Death God who will sanction the use of death magic for him/alter his body so that he can now cast death magic. And the price of this is a pact he made with the Death God to summon him into the physical realm.
First of all, this whole line of content sounds cliche even to myself. Furthermore, this would then mean you should in the sub somehow mention (even just briefly) that the magic system you are thinking is that there are set types of magic and not everyone can use every type of magic etc. Personally, I think this would just complicate the sub needlessly and I would just forget abt the Death God part but that's just me.