Have you played DotA before ?
If you have, you know Fissure spell from Earthshaker ?
That's the most accurate spell I can describe of
You see, destructibles/dummies are created and instant pick up enemy unit along the crevasse and damage + stun those units
Now I want this formula, please !
If you never seen Fissure before, watch this:
http://www.youtube.com/watch?v=h7GRiMIkeOo&feature=related
You notice that the Hero cast the spell and instant creates a straight line, along the line, it will stun and damage picked unit near the dummy/destructibles.
And I want rectangle-pick, not circle-pick like the usual function we frequently use.