Remnants Wrought Iron Magus Killer

It was supposed to be a routine mission nothing could go wrong, just stop another crazy magus trying to create a passage to the Root. ...That is what Shirou Emiya thought but how will he handle things if everything goes south with him landing in a foreign world called Remnant. Will he rise up to become a Hero of Justice like he always wanted to be or will his ideals betray him..