need help with trigger spells

I have this trigger where everytime a unit casts a certain dummy spell , the unit will immediately cast another spell.

but my problem is i got stuck where i cannot find my custom spell.
here is the trigger:

- Event
- Unit - A unit starts the effect of an abilty
- Conditions
- Actions
- If ((ability being cast) Equal to Black Arrow) then do (Unit - Order (triggering unit) to Neutral - Firebolt (Target unit of abilty being cast)) else (Do nothing)


I cannot find my custom spell on the Neutral - Firebolt part.

I need help pls.

Find it? This is probably an issue with it not being in the correct category (item, hero, unit?) Or that you didn't rename the spell so it is hidding close to the non-custom ones since world editor sorts by name.

That's just an Orderstring. Whatever Orderstring you use, use that 'spell'. Eg. if your spell was based off Shockwave and the orderstring was "shockwave", you would use Orc Tauren Chieftain - Shockwave.