Oblivion Nullification (忘却無効, Bōkyaku mukō?, localized as "Oblivion Negation"GO) is a Skill mostly similar to Oblivion Correction that allows the user to perfectly maintain their memories across summonings.
| Rank | User(s) |
|---|---|
| EX | Hephaestion Mnemosyne |
| The system named after the memory goddess Mnemosyne enables her to almost perfectly carry over her memories from previous summons, although this feature is limited to when she's summoned by the Chaldea summoning system. |
| Servant Skills |
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