It also appears as half of Roxas's dual set of Keyblades alongside the Oathkeeper, and was transformed from the second Kingdom Key Roxas obtained after absorbing Xion.

In Kingdom Hearts 358/2 Days, it can be upgraded to the Oblivion+. The Oblivion is often associated with the memories that are passing away, such as when Sora reaches the last floors of Castle Oblivion, or when Roxas begins forgetting Xion following her destruction. The Keyblade's name means a 'state of forgetting or having forgotten', and its Japanese name has the same basic meaning. When the Oblivion is summoned in Kingdom Hearts II, black smoke and violet sparks surround it. The diamond in its hilt also resembles the diamond in the original logo of Hollow Bastion. A chain-like design runs up the length of the blade. The Keychain's token is a black version of Sora's crown necklace. The teeth are in the shape of the Kanji for 'darkness'. The hilt guard is comprised of two bat-like wings extending downward. Oblivion is similar in shape to the Kingdom Key, though is black and has a longer reach.

Kingdom hearts 2 oblivion keyblade