I really love the way Asta and Yuno's relationship has gone.
I wrote it off as "this will be another stupid Naruto/Sasuke rehash" but nope, they've just been bros throughout the whole series. No anger, no hate, just love. Quite possibly the friendliest rivalry we've ever seen in a shounen, certainly for me at least, which is such a refreshing change of pace. Seeing that friendship, that desire to surpass each other culminate in the ability to out-do the future someone else had seen for them? Perfect capstone.
I know Black Clover gets shit on a lot for being so ridiculously generic and stereotypical, but DAMN if it isn't the best 7/10 shounen I've ever read.