This power is redundant in 1v1, but in a multiplayer format, it offers a player a way to bypass the usual rules and sweep a win, forcing an interesting dynamic where other players need to protect Shinryus target
This is definitely one of those commanders who can succumb to its own hubris
Considering how Ariel - Spectacular Singer largely carried multiple deck archetypes with the release of Lorcana: The First Chapter , the power of a character with a strong Singer count has been more than cemented
Making insignificant creatures into serious threats has a lot of value, especially if you tag creatures like Esper Sentinel or Captain Ripley Vance that care about their power
Not background necessarily, but some other line of text that says something along the lines of Whenever you sacrifice a Treasure token, give a creature a +1/+1 counter and trample until end of turn. That would make it a lot more interesting and powerful, but I suppose not every card needs to be great
While the set-up for the turtle may be appropriately slow, the payoff is explosive, and it could find a home in Modern quite easily