Fixed, will be applied after update.
What was changed:
You can't stack http://db.pandawow.me/?spell=88747 before arena start.
AOE damage can't hit it.
Crowd Control can't hit it.
Enemies will see mushroom in stealth, only if they are close enough (blizzlike).
Now even if you go in LOS your http://db.pandawow.me/?spell=88747 won't loose heal stacks.
If someone kill your http://db.pandawow.me/?spell=88747, highlight effect will be removed too.
Fixed problems with faction.
Can't reproduce a bug with big size, so it won't be fixed, so create a new topic with video how to reproduce this bug, and I will fix it.
Dampening reduction was already fixed.
Seems that now http://db.pandawow.me/?spell=88747 should be are very close to blizzlike, hope you will enjoy it :)