hehe, thats my first spell to be submitted here.
on your feedback:
i'm using the If - (Number of units in (RR_Target_Groups) Greater than 0 because there is another actions in the Then - Actions (Killing the rocket, and leak removal)
about the leaks, yeah now i noticed that it would leaks if...
well, i just finished coding this Elune-Arrow-like spell for my map,
it launches a rocket that travels in a line and will explode if it comes in contact with a tree (will destroy the tree) or an enemy unit (damaging and stunning)
have fun with it :D
edit: oh yeah it's in GUI, and is...