Metamorphosis help

well, what i actually need is a non-triggered ability that will do the following:
lets say that i have 3 units, DH - standard Demon Hunter, DH2 - standard evil illidan DH3 - evil illidan morphed, i need this ability:

DH1 <-> DH2 for 90 sec
DH1 --> DH2 forever, no changing back
DH2 <-> DH3 for 90 secs

u used to do this with a trigger that says "unit finishes casting metamorphosis 1, casting unit equal to DH1, replace that unit with DH2" but it looks crappy, and u have to relearn all the spells manually, not to mention that it changes its name 3 times :)
ih has a hellbourne as DH1, darkreaver as DH2 and shadowsong as DH3 (they use the same names ih object editor however...) so, can anyone help me on this ?
i would like to involve as less triggers as possible...

You can fix the naming part by removing all the other alternative names from those hero models in the editor.

As far as what thing it morphs in to, I reckon you could make three separate metamorph abilities, one for each level, and then take an icon-less ability like the Mana Stone regeneration, set it to do nothing, and , when it's learned, add your first metamorphosis ability to the hero.

When it's learned a second time, remove the first ability and add the second. Etc.

As far as how long it metamorphs, I believe if you set the morph duration to 0, it will be permanent. So, set the duration for each of the three abilities.

This strat uses a trigger to add and remove the abilities when the fake ability is learned, but it actually does morph the unit, which should fix your issues of ugliness.

...are they heroes? So, like, level 1 of the skill turns DH1 into DH2 for 90 sec, level 2 of the skill DH1 into DH2 perm, level three DH2 into DH3 for 90 sec? If so you can just use metamorph and set the duration, for the infinite transform set the duration to 0.

Using a chaos ability works far better than "replace unit"; because the chaos ability is used to turn Grom Hellscream into chaos Grom Hellscream it works perfectely for transforming heroes. (skills, names, bonuses and buffs/debuffs are preserved)

Might still look a bit crappy tho - possibly can be improved with animations of SFX.

so, there is no "real" way of doing it, right ?:)
as for chaos hellscreem, he has than animaiton, thats why it looks so cool....he's not even replaced in the map, he just shifts animations :)
even with the duration, DH1 will switch to alternate DH2....that means that big deamon thingy....i want it to be evil illidan :)

ok, i'll try the mana stone regen thing.....

EDIT/NEW POST: I found the strangest thing.....while i was stressing over the "Demon hunter is not demon hunter, hes just a black demon" thing, i accidentaly clicked to animation and found this string....so i gave it a shot, and IT WORKED :), now i only need to make this work only on level 1 and 2, but that can be done thru " level of ability being cast is not 3" right ?
both actions have to be in the trigger tho, or the game ****s up :) (sorry for 'dirty' words, but there is no other way to say it :) )
here's the trigger

Event:
Unit - A unit Begins casting an ability

Conditions:
(Ability being cast) Equal to Metamorphosis

Actions:
Animation - Remove the alternate animation tag to (Triggering unit)
Animation - Remove the alternateex animation tag to (Triggering unit)think casting unit works too, but i tried it first with this one and it worked :)