In the trivia, I believe the attribution to Soul Caliber is incorrect. This is a reference to the goddess Kali. Originally a Hindu goddess, there's a lot of pop culture references to her as a dark or destructive force, in particular in Indiana Jones and the Temple of Doom, but also in other media like the Brent Weeks Night Angel Trilogy.
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Looking at the effect when a soul is ejected from an enemy, only to float around helplessly trapped, and then destroyed with a simple touch -- this has to be a reference to the age-old arcade classic "Bubble Bobble", no?
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I feel like the name of the "Kaliber k'pow uboom k'bhang" synergy might also be a reference to the Knights Who Say Ni, from Monty Python's the Holy Grail, and with the Holey Grail being one of the required items for the synergy.