I think it's on purpose. Vysis seems like the type to just blow up people's egos for her own amusement. Then when two "strongest" meet. They fight, and she laughs.
I see people assuming the Type-Moon reference was of Gilgamesh, but I say it was Ciel. From Tsukihime, or Melty Blood if that's more your jam. It would also fit more into his motif.
:shamihuh:
It was a Batman The Animated Series reference. The episode " Almost got im" where the villain gallery are having a poker night, recounting their convoluted plans of how they almost killed Batman. Then Killer Croc butts in with his story "I THREW A ROCK AT HIM!" Everyone rolls their...