is there a way to increase the max hp of a unit for a period of time? e.g. lvl 1 duration 20 seconds hp +200 ( +200 mana) lvl 2 duration 25 seconds hp +300 ( +200 mana)
Of course this is possible. You will have to use a three levels skill based on the item skill which increases maximum hit points (search for it). First level will have level 1 bonus, second level bonus for level 2 and so on... I'll call this ability "Vitality (dummy)"
To spell cast by the caster will obviously be a dummy ability, maybe base it off berserk with no effects. I'll name it Vitality. And now there are two ways: Make the spell dispellable, or of course not.
1) Dispellable Give the duration of the berserk dummy ability to the real duration of the spell (ex: 20/25/30 seconds). It must have an unique buff of course (I'll call it Vitality (buff)). And now let's go to the trigger:
Event - An Unit Starts the effect of an ability Conditions - Ability being cast equal to Vitality Actions - Unit - Add Vitality (dummy) to (Triggering Unit) - Set Level of Vitality (dummy) for (Triggering Unit) to (Level of Vitality for (Triggering Unit)) - Wait 0.10 seconds - Wait for Condition (Triggering Unit) has Vitality (buff) equal to false checking every 0.10 seconds - Remove Vitality (dummy) from (Triggering Unit)
2) Undispellable This is very simple. Just give a 0.01 seconds duration to the Vitality ability, no buff necessary. And now let's go to the trigger:
Event - An Unit Starts the effect of an Ability Conditions - Ability Being Cast equal to Vitality Actions - Add Vitality (dummy) to (Triggering Unit) - Set Level of Vitality (dummy) for (Triggering Unit) to (Level of Vitality for (Triggering Unit)) - Wait (20+(5*((Level of Vitality (dummy) for (Triggering Unit))-1))) seconds - Remove Vitality (dummy) from (Triggering Unit)
