If you're hunting for the absolute titans, focus on the original Kanto starters: Charizard ex (#199), Blastoise ex (#200), and Venusaur ex (#198)
While the Synchro of Unity starter deck is a solid choice for newcomers and veterans alike, there is still room for improvement
8 Pikachu ex Charging An Attack Pikachu ex is a lightning-fast Electric-type that can start zapping your opponent in no time
So the case, filled with cards, would be roughly the same as a slightly overweight Cocker Spaniel
You play a deck like this because a bunch of huge robots beating face was one of the things you wanted to do when you learned to play Magic as a tween, so why not let that side out every once in a while
Such a field on its own is a terrifying prospect for many opponents, even ignoring the potential to further combo off of this to bring even more powerful monsters like Mirrorjade the Iceblade Dragon, with few other spell cards viable in the current metagame able to provide this much advantage off of a single activation