To be fair, Buster Blader wasn't really ever a competitive card to my knowledge. Perhaps in the very old days of Yu-Gi-Oh, he was. But to me and many other players at the time, he was just a cool card to have. I'd jam him into Warrior decks or any other deck where I knew I'd be up against a Blue-Eyes or three. The Dark Beginnings printing was in fact the very Buster Blader I had for years. I eventually sold him to a vendor at some local big tournament. I don't recall for how much, but it was an oddly high sum even at the time.. It was the right decision, financially, but I miss that guy.
There were some other printings of Buster Blader, even at common, that passed through my possession at one point or another. But none of them was as special as that super rare holographic one from Dark Beginnings.
I had almost forgotten all about Buster Blader after all this time. But then I saw this.
This guy, though, can destroy an opponent's monster and equip it to himself. Once per turn, you can send a monster equipped to him to your Graveyard and destroy all monsters your opponent controls with the same type as that Monster. So not only can he hose Dragons, but any other deck that runs a bunch of creatures with the same type: Beast-Warriors, Spellcasters, Warriors, you name it.
Is this ability competitively viable? I'm honestly not sure. People are trying to build around him, though.
In this case, you fuse Buster Blader with any Dragon-type Monster. He's a level 8 monster with 2800 ATK and 2500 DEF, but can't attack directly. However, he's a sort of super Buster Blader, gaining 1000 ATK for each Dragon on your opponent's side of the field or in their graveyard.
It gets better. The Dragon Destroyer also moves all Dragon type monsters your opponent has into defense position. Also, when any Dragons are in Defense position, you inflict piercing battle damage. Basically, your opponent's Dragons have to lay down and take a serious beating. This is quite flavorful and makes for a great story to tell your grand-kids about. But it's actually quite a drawback if you're not up against a dedicated Dragon duelist.
However, while the competitive ramifications of these two new cards are limited, they are pretty darn cool. There is a combination with DNA Surgery, which can make all face-up monsters on the field into Dragons. That's a possibility., especially as people play that card already as a sideboard option. You could build a deck around these guys. Sadly, Skilled White Magician - the easiest way to Special Summon Buster Blader from the hand or deck needs the original Buster Blader to function. But the new Destruction Swordmaster can be summoned from the Graveyard using his effect. A very old spell called Emblem of Dragon Destroyer can go get either "Buster Blader" card from the graveyard, too.
If I were to come back and play Yu-Gi-Oh, this is probably the deck I'd play. Just for fun. Glad to see my good friend Buster Blader back in action!
In case you really do want to build a Buster Blader deck, here's a good deck list to start from.