the one you reached for (слэш)

“Who did this to you?” Arthur finally chokes out, because someone must have—done this to him, that is.
Arthur has learnt two things in the last few months. One; Merlin is more powerful than any one human should be (but if someone has to have this power, it is right that it is Merlin; it could only ever be Merlin). Two; he is as incapable of backing down from anything as Arthur is (even if it is each other; even if it tears them apart).