After 15 seconds, 15% damage "Amplify damage" can not be bigger than 30% of "curren" HP heal.
It is a bit disappointing.

Maybe to change the "Amplify damage" into a dynamic?

For example, a target has 10000 HP.
It takes frostbite. (7000 HP remain)
15 seconds later. (Assuming that it has not been any attack)
It's HP back to 10000.

Polar/Ice Age
Bites enemies with bitter coldness, taking away 7%/30% of current HP. Damage done during this time is amplified by 3.5%/15%. Lasts 15 seconds.

When Debuff is gone, that 7%/30% of current HP will back. (Frostbite heals the target!)
This bug also appeared in 4.1.


function GRV takes nothing returns nothing
local unit u=GetSpellTargetUnit()
local unit u2=GetTriggerUnit()
local effect B0V=AddSpecialEffectTarget("Abilities\\Spells\\Undead\\FreezingBreath\\FreezingBreathTargetArt.mdl",u,"origin")
local real D8=.0
local real hp=.0
local real L6=.0
call GroupAddUnit(CL,u)
set hp=GetWidgetLife(u)
call SetWidgetLife(u,hp-(hp/ GEV(GetUnitAbilityLevel(u2,'A01M'))))
set L6=GetWidgetLife(u)
call N5((15.))
set D8=L6-GetWidgetLife(u)
call SetWidgetLife(u,hp-(D8*GXV(GetUnitAbilityLevel(u2,'A01M'))))
//The "hp" should be replaced by "L6"?
call DestroyEffect(B0V)
call GroupRemoveUnit(CL,u)
set u=null
set B0V=null
endfunction