Theoretical Question - Possible?

I want to make a hero skill that parallels Vampiric Aura, except only for the melee hero itself, and that returns mana instead of hitpoints based off of damage done through attacks.

I know that it is possible to do as an orb effect ability, but I wanted to check and make sure that it is in fact *not* possible to do without making it interfere with other orb effects (which Vampiric Aura manages to avoid.)

I believe it's rather an Orb or a complex trigger; otherwise I don't see how you could do it with a normal passive.

The only way to craft a non-orbed attack effect like that would be JASSed in combination with an attack detection system.

If you trigger it you won't have any problems with stacking - it will be 100% stackable...and 100% hard to make well.

I think it would probably be easier to use a damage detection system and trigger the mana gain. Then again I don't know anything about orb abilities.

If you want to do it exactly like that, you are getting something that would be kind of imbalanced and very hard to code.

I once made a mana steal orb using orb of lightning new and that want of mana steal spell, it always stol 3 mana pooints or did it have a chance to steal 20 mana points? I don't remember, but both are possible.