Chaos Spell Modification

The Chaos ability is made to transform hero into another hero.
Is there a way I could make the hero keep his level and stats?
I would appreciate it if you could help.

Save them as variables and the use triggers to restore them.

If none of this makes sense it is time to hit the tutorials.

Yeah... Time for me to hit the tutorials...
It would be nice if someone could make me a JASS for these...

Although I could make JASS triggers for you all day, sometimes its nice to learn something. Try spending a few days reading tutorials, and if you still have problems ill be happy to help.

I will try but I rarely have any free time to do stuff. I only get around 30 minutes to an hour to work on my map every day.

If you just need to tranform one hero into another one (keeping stats and such things), why don't you just use something like Metamorphosis: you could add it within a disabled spellbook and then order your hero to use it... However I don't know if this can fit your map.

Chaos keeps the stats if you add the opposite form to the "Techtree - Dependency Equivalents" field for each unit.

It's a permanent change, not just a timed change.

Yes, that's right! How could I forget it! Anyway just the morphing unit must have the new unit on the field "Techtree - Dependency Equivalents".