Spells with multiple effects?

simple as stated: is it possible for me to create or modify spells/abilities so that they have multiple effects?

such as Roar that also stuns adjacent enemies

if its possible can anyone tell me how it can be done?

well roar can only target either friendly or enemy, cant do both, and spells are "hardcoded" with thier effects.

However! When roar is casted, you can detect the unit that casted it, create a region on the fly around that unit, with a set height and width. Then take all the units that are in that region that belong to an enemy of that player, and pause those units, wait X seconds unpause. Almost anything is doable though triggers...

Or you could just create an invisible invulnerable flying unit on top of the hero, and have it cast Warstomp...