I don't know much about Overwatch, so forgive me if I'm wrong, but isn't the quote "Ryuu ga waga teki wo kurau," meaning something like "Eat my enemies, dragon?"
That'd be "ryuujin" rather than "ryuukin," but the rest seems right. "Taste the sword of the dragon god" is a pretty good translation for feeling good in English while still being accurate, I feel, though technically it'd be "eat" or "recieve," rather than "taste."
I don't know much about Overwatch, so forgive me if I'm wrong, but isn't the quote "Ryuu ga waga teki wo kurau," meaning something like "Eat my enemies, dragon?"