If it's not Spiral, it could be suicide. I think those are the only options. I can't imagine Silver behaving the way he has, unless he honestly wasn't aware that the explosion was his fault, and I think Haguile would tell him were that the case.
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"[This is perfect. I have always fought with these kinds of cards. You say that I have lost the moment I was dealt? It's just the same as always!]"