Changing Unit Max health via Triggers

[Damage]

Hey all, I want to be able to change the maximum health of a unit entirely by use of triggers.

I know this is possible as an AoS style map known as Eve of the Apocalypse: Twilight has a hero called the Forlorn Martyr. This hero is able to create Wards which have a maximum health equal to 2 x the strength of the hero.

Obviously, he has not used the item ability with multiple ranks to increase the health of the Ward, as there are quite simply hundreds of thousands of possible values for the health of this Ward.

So what I'm asking is: How do you change the maximum health of a unit by way of triggers and NOT max health increasing abilities?

Or perhaps, the max health increase ability only gives 1 HP and is added X amount of times?

 

[Maker]

I created runes of +1 HP, +10 HP and +100 HP. If max HP should be increased by 263, I'd loop +100 twice, +10 six times and +1 three times, giving runes to the units.

 

[Damage]

Do the units require an inventory for this to work?

 

[Maker]

I give units modified unit inventory before looping if they're not heroes, and remove it after looping. Set "can get items" and "can use items" to true.

 

[Damage]

Aha very clever. Thanks for this technique and I'll give it a try. +REP