Unit Group - Pick every unit in (Units within 250.00 of (Position of (Casting unit))) and do (Actions)
Loop - Actions
If (All Conditions are True) then do (Then Actions) else do (Else Actions)
If - Conditions
((Picked unit) belongs to an enemy of (Owner of (Casting unit))) Equal to True
Then - Actions
Unit Group - Add (Picked unit) to ([enter your Unit Group here])
Else - Actions