How do I make a special effect have expiration timer just like a unit can have?

[Frostbarge]

Just like a unit, how can I make a special effect die or get removed after a number of seconds?

 

[water_Knight]

Well if you a triggering it. There is a action to remove them

If done by a spell no idea.

 

[KnnO]

You need to make MUI triggers:

(Try to search for MUI if you don't know it)

 

[Frostbarge]

Thanks, I thought it would mess up my trigger, but it didn't. I have another question though, how do I set a variable to nothing(or none)? Like make a variable that stores a unit empty and not store any unit.

 

[moyackx]

Here's your solution: http://www.wc3c.net/showthread.php?t=104216