How can i make stacked abilities or buffs? (more than 1 inner fire, curse, slow etc etc)

[JFAMAP]

Hello everyone. Currently i am trying to create new 3 items for my map but i have to add buffs for the people can see what kind of effects which units has.

Currently i am creating dummy unit who can casts Inner Fire and InnerFire buff placed. Ok
But after that i am casting another skills based on InnerFire (inner fire level 2 with different buff named InnerFire2) but it seems second one overwrites the first one

Is there a way to hold both of buffs?
OR
Is there a way to add multiple buffs?

 

[Tasyen]

Update to Warcraft 3 V1.30+ (It has this multiple inner buffs with different buffs affect one unit built in).
Or mimic buffs using auras.