Secret Shroud (2016)

The crossover Keyblade themed after Blake Belladonna in Monty Oum's RWBY.

Just like her namesake, the Keyblade is predominantly black in coloration representing the 'B' in the 4 member ensemble.
Its shaft is derived from Blake's Gambol Shroud weapon, forged with the black cat motif since as everyone already know she's a cat faunus.
The Keyblade's teeth is her black emblem, shared with the Keychain token.

Probably for now with 3 out of 4 RWBY themed Keyblades, this revamped version is the best in terms of practical length and swing speed, good for normal and reverse gripping.

Kingdom Hearts belongs to Tetsuya Nomura, a joint franchise between Disney and Square-Enix.
RWBY belongs to Monty Oum.