Forum:Concerning starlight road

Just a few questions cause this card been bugging me a lot.

1. My opponent XYZ summoned a monster and i used black horn oh heaven, then he used starlight road. Is he able to do that?

2. So i direct my opponent and he special summons Gorz emissary of darkness and i negate it with black horn of heaven, and then he uses starlight road. Is he able to do that?