Right...I need some help

Right people...I need some help with a Trigger. Normally I try to do everything myself, and usually it works. If I'm not mistaking, this would be my second question. So everything goes well normally...But I am falling of the subject, so here comes the question :)

I want that people inside a certain region do more damage (or get defense. At least a bonus to something) but not just get that bonus. Hum, you see the region is in a village. But you need to place a building first, and then the bonus will occur. But only for the units of that building.

I got right now this :
Event - A unit enters region Blabla
Condition - Triggering unit equall to Arcane Vault
Action - ...

So I can't figure out what action I need...
Please help with this.
Thanks in advance, and thanks for reading
Dark Dragon

Why don´t u create a hidden unit with 0 collision etc. in this region. You could give it an Aura with the effect you ant and wouldn´t need much triggers :////

edit:

Should have read the whole post ;D

Yes, I could do that, but how can I let the unit Share his aura? After all, only the team that build a 'Certain building' in the region gets the bonuses.

I guess it´ll be a Multyplayer map so placing him in an allied team and give him a really lame AI won´t work right?

Yes, that's what I forgot to say with it...Because it is a Multiplayer map allies can't be used. (Though you can get 1 (Good) ally and 1 (Evil) ally) So...

What about giving every unit in this region this Aura (whitout caster/target/special effect and without AOE), might work if none of your hero´s has 5 Spells

How could I do that?

Event
Unit enters Region
Conditions
Owner of Triggering unit = Player 1 (red)
Action
Add Ability xxx Aura to Triggering Unit

Event
Unit leaves Region
Conditions
Owner of Triggering unit = Player 1 (red)
Action
Remove Ability xxx Aura


something like this

Hmm...I will try it, thanks a lot for helping me out :D
If it doesn't work, then you'll hear it :)

Thanks for your help and your time
Dark Dragon