Title, what functions can I use to have it so that if a ray detects an MOSParticle or MOSRotating, it will set it as terrain?

For example, I have a tool that will turn any terrain into 'Unsettling Metal' (Just a copy of metal that never sets). I want to make it so that if the beam of this tool hits an actor, the actor will die and then IMMEDIATELY 'set' into the terrain, so you can metallize him/her.

OP or not, just for the sake of figuring out how to make something immediately embed into the terrain mostly.

You could have a look at this awesome mod it has a tool that instantly turns actors into terrain. Take a look at how that mod does it for a more detailed method, but essentially all you need to change an object into terrain is this:

Ah perfect!, Thanks.