Stupidly OP Health Buff-+30K Health At Level 10 (Patreon)

A patreon wrote:

Got an exploit for you. Go and /kiss Kwee Q. Peddlefeet in your major city and you get a buff for nearly 30k extra HP (I assume because of bugged scaling)

I tried this on a level 10 toon I had which normally has 552 HP. Their health went up to 29,156. 

(Literally just found out about this, will add more to this article as I find it). Works in bgs (tested) at max level, buff is removed on entry to low-level battlegrounds. Also in pve instances (ty smusen). Some damage abilities eg monk touch of karma or touch death work according to player max health, so this is a significant damage increase for several classes.

IMPORTANT: NOW FIXED BUT IF YOU HAVE THE BUFF ON YOUR CHARACTER  IT WILL BE 400X HP BUFF, MAKING YOU AS STRONG AS A RAID BOSS!

Edit: just soloed Orgrimmar.