It functions almost like a legendary sorcery in that you need to control a legendary creature, but with the Ring tempt at the start of the effect and Commander's color identity, this is essentially a Grim Tutor with upside rather than life loss
Sonic wants you going fast, and grows himself and the entire team of speedsters hes inspired by attacking
It requires specific kinds of board state: your opponent must have a board youre able to bounce, you need a creature big enough to bounce all of their important creatures, and you need to have sufficient resources to take advantage of trading card advantage for tempo (which runs counter to how almost every other Exploit card works)
Bugenhagen is also a very passable two-mana mana dork, too, so it has a lot of utility even if you cant stick a big creature
Cards like Omnath, Locus of Rage and Scute Swarm ensure your board presence grows with every land drop