Method Aura:GetMaxDuration [-] [+]
Returns the amount of time this Aura lasts when applied.
To determine how much time has passed since this Aura was applied, subtract the result of Aura:GetDuration from the result of this method.
max_duration = Aura:GetMaxDuration()
The maximum duration of the Aura, in milliseconds.
Valid numbers: integers from -2,147,483,647 to 2,147,483,647.