Horus Phantom Knights (Devan R) vs Labyrinth - YCS Richmond Round 2 Feature Match 

Yes unless you use it for an xyz. Now he’s detached as material and goes to the grave

unless you use it as an xyz overlay and then discard it as a material, this way it goes back to the grave, otherwise it is banished

No, since it was used as XYZ Material, it goes to the grave instead