Correct me if I’m wrong, but from my understanding, it’s only impossible for an object with mass to accelerate to the speed of light. If something was magically accelerated to above c, it wouldn’t break any rules to stay above c.
So what would happen in a collision between a slow object and something moving faster than c?


There is no such thing as faster than c. From the POV of a photon, the distance to its destination (no matter how far) is zero - it’s already there in literally no time.
You can’t go faster than that.
Not with that attitude.