Custom unit using medivh as base

Wondering how i would go about doing this. I'm going to try and take medivh and use him as the base for a custom unit, i want to swap his model for a heros, and his raven form for a dragon
but he only has 1 slot for abilities, which is his morph. anyway to add more slots or, just start with a hero and add in all the "alternatex" stuff on the dragon unit. going to try and play around with it. but any help would be appreciated. or just tell me if you doubt it will work. was thinking about using it in some type of campaign.

ok. so far i figured out that crow form really only applies to medivh (although you can give this ability to other units) it just leaves medivhs name/character model (face) in there. Kind of same when i tryed to use the druid of the talons storm crow form, it wanted the adept training. So my next questions are.

Can you actually edit abilities inside the slk's

Or what type of work around could i use. I was told i could make it trigger based where at one point in a game i could make it swap units for a dragon, but i was hoping to make it an actually ability in game. (hero ability would have been even better)

any suggestions. or should i just give up now

Here's what I do for my own game! E.g I create 1 custom unit for the base called "turret" and the other for the other transformation called "tank".

In the turret mode, I wanted the unit to have no attacked capability, so i used a riderless horse as model but used a steam tank as graphics. As for the tank, I used a gryphon building(though it look weird). I'm using the order command like "stop", "hold" or "attacked" to detect the "convert command". Here's goes the transformtion!

E: A unit owned by Player1 is issued an order with no target
C: unit-type of (ordered-unit) equal to TURRET
Issue order equal to (hold-position)
A: unit-replace(ordered-unit) with a TANK using the new
unit's default life and mana
Selection-select (last replaced unit)

Likewise, to change back to turret, replaced turret with tank and vice versa!

Well... unless you plan on making another Medivh in the map, I'd just edit the main Medivh one. Change the straight Medivh's name, model, etc., then change the crow form's straight stats too. You'd have to bounce around a bit to get the dragon stats right, but that's all.

Good idea using order detection to trigger transformations.....that works much better than custom units when it comes to buildings :)

Thanks to the "stop" and using "hold" in the warchasers!