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Gasmasks will be required if they use sleeping gas... why Cibryll made them capable of such, only she knows... but it did aid with answering why Valkyrie Zylle Horton was poisoned... corrupted flower dragon sleeping gas is slightly toxic...
...
Perhaps the "LSP" can refer to the works where the Lunar Shadow entity is a threat (LSZ, LS, LSX, and the year Yes Town is annihilated by Cibryll's ideas Aidan)...
Sort of like a story arc...?
I'd be down for that, though it wouldn't surprise me if you and Cibryll already planned the whole story arc out. From what I can tell, Lunar Shadow 0, Lunar Shadow and Lunar Shadow X all have Aidan Flamberge as the main antagonist, which is already one story arc. Selenic Shadow is non-canon (and I did theorize that the main character and all the NPCs are all dead due to one of the areas resembling Myst Zone) and Apocalyptic Shadow seems to be the last chronologically though I'm not sure if that's correct.
That's not even accounting for Lunar Shadow Memories or the Lunar Shadow Reverse concepts.