The only way to do what you want to do is copy the code block twice. Because mana gets calculated on cast. there arent any methods to do infinite collisions. As far as i know on collide gets activated only once. Not sure though.

shacro is correct, only the first collision triggers the OnCollide block.

As above, it only collides once. But within the collide you could set up another blank orb to continue along the same path as the first that has its own collide. It won't match exactly because you won't be able to feed the start angle into the collide code, but you could use find angle with mouse pos, it will just be more controllable. An issue I can see is a collision counting immediately if it's still going through a wall but a slight WAIT might make it okay.