collision between units

Hi ho to y'all. I need to know how to detect collison between two units. Depending on the unit types, one should damage the other via triggers, but I haven't got it working. I'd rather avoid using regions, cause there'll be a lot of units, and they're created via triggers. Unit within range doesn't work, cause you need a specific unit, I need a trigger which detects the type of unit. Any suggestions?

Are you sure that you cant use regions? Other than that I dont think there is another way...

...Darn it, I'm almost positive there is no other way... except... wait!

Why dont you just give the unit an aura that damages all the units around him? Like immolation? That should work fine.

Yes, immolation with a small radius (enough to seem like collision) and no art would work for your purposes.

I had the same problem and then it hit me, IMMOLATION. How stupid to make some advanced thing with triggers when theres already an abilty for it. My skill works perfectly so it works nice.