I want to create a spell that plants something in the world at the target of the corsair (similar to Rune spells or conjuration).

Is that possible? Since I'm not able to find a script function for that.

Thanks

Additionally, is it possible to target non-actors with a scripted spell?

Hmm...Possibly have the spell generate an item x distance from the player then immediately drop it to the closest collision plane. Is this something you want to happen at a point decided by the player or a preexisting area that this will happen at. You may want to check how the destruction spells work, there should be something that defines where the burn marks/ice patches show up at.

They are only applying an decal (or visual effect) to the target location, no scripting involved.
What I am missing is
a) a function that tells me where the player is heading (or only to create an object there; create actor exists, but that's of no immediate use)
b)an EVENT that triggers if a spell hits an object (once again only actor hits trigger anything)