I got no clue

How would i make it so the event was if the unit was under the effect of a buff i can't seem to figure this out for some reason plz help

There are no events based around buffs.

There are no conditions based around buffs.

There are no actions to control buffs.

Therefore, you will have to work with the ability that causes the buff, if anything. My advice is to rethink your strategy for creating whatever effect it is you are triggering.

Ummm, yes there is.....

There is one called Buff Comparson, but its pretty much useless, you cant compare a units current buffs, only the list of them, witch is kindof retarded.

Conditions
((Triggering unit) has buff Aerial Shackles) Equal to True.
there you go now you can check to see if a unit has buff.

Ahhh, so there is a buff boolean, that makes things much easyer.