Making buff spells MUI?

How do you make triggered buff spells MUI?

Depends on what kind of buff, if u cast the buffs with triggers then u dont need to worry about that, if u change unit properties through triggers then u need to somehow find out if the unit has the buff, if it does, remove all of its effects and then apply the new effects.

what0s MUI?

Multinstanceable

Then that seriously depend on what the buff spell does. Some buff spells are horribly easy to make multi instanceable and some are horribly difficult.

Kind of hard to make a generalization here

Okay. The buff spell that I want to make MUI is simply a timed poison that depletes you life by 1% every couple seconds. Would that be too hard?

I think the game has spells that does that already.

Oh, really? Are you sure? Oh well, I'll check for myself. Thanks though.

wouldnt sadow strike be able to do that?

There's also a "Poison" ability.