What you do is simply to stack 6 glyphs of renew.
Might work on other servers too, so far only wowbeez is 100% shure.
(how to do it, see here
)
The first ones will reduce its renew-time, but tick for a great ammount of healing.
(if you want you can stay around 4 seconds renew to get 2 fast and heavy ticks)
Having 5 makes your renew cost mana, but nothing happends! keep going.
When you reduce renew from 0 seconds to -2 it bugs out and will stay on your target until it dies, thou get back to normal healing ammount.
Great for raiding or that extra healing in pvp.
Stays on while zoneing or logging out/in.
Thou combat-log tells who cast it.
If you die, it dissapears.
More updates about glitching skills via glyph-stacking will come!
(Will prob edit it in the same post)