effect_nightvision: 1

Needs the amplifier after a colon

Otherwise, assuming it's indented correctly (use the <> button above when posting code next time, please) I think that will work.

Yup, correct.

If you want some effects on it you need to add an effects block- look at some of the other spells (like Boon) for examples

Ok, thanks again! Your plugin is amazing! :)