Well, I found this spell on a well known private server that I play on, and I figured I would contribute a bit to the community.
The item Manual: Dense Frostweave Bandage - Item - World of Warcraft is not obtainable ingame, and the only way to access it is through a vote shop system. If you use the manual, it will teach you "First Aid Rank 16". This spell will heal 4100 damage over 4 seconds, and is incredibly helpful..
Note: counts as bandage, therefore the "Bandaged" debuff applies normally.
Edit: Tested on Neverendless, works fine but requires 450 First Aid. (Requires no reagents to use)