Theyre literally all over Akihabara and Nakano Broadway, just like the retro game stores, and in most of the shops in Ikebukuro, so youll definitely be tempted
Mana Cannons My vote for the best card name in the set, Mana Cannons is one of those cards thatll get initially dismissed by some people, who will then come around when the card wrecks them
Aether Snap Aether Snap is a more conditional black sorcery, but it can work in the right instances against counters or token-themed decks
Finally, 330 HP is a very respectable HP score, but watch out for that shift in weakness
Baru, Fist of Krosa Baru is an descendant of Kamahl, Fist of Krosa, the protagonist of the Odyssey block and Onslaught block stories
The other parts you need are simply a zero-cost sacrifice outlet and some effect that can place a +1/+1 counter on creatures as they enter the battlefield: Grumgully, Path of Discovery, Juniper Order Ranger, or Rhythm of the Wild for example