Goro-Goro, Disciple of Ryusei Goro-Goro, Disciple of Ryusei is a bomb way to take advantage of your creatures with modifications: That is, equipment, auras, or counters
Considering what happened to The Ur Dragon, who held a very similar financial position before its reprint, its hard to encourage buying this card unless you really want it
On the commander side, Aurelia, the Warleader is far more expensive, and Raiyuu, Storm's Edge has a heavy typal restriction
Helper cards are especially useful at Limited events, prereleases, or casual tables where someone asks, "Wait, what does this emblem/token/dungeon do again?" for the sixth time during a game
It's very strong at the kitchen table and you can check it out here - Getting Nasty in Commander with Nashi | Article by Abe Sargent (coolstuffinc.com) The sixth deck I built was a Mono-Blue Artifacts list built around Katsumasa, the Animator
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