Memento fusion is bugged and will let you use non-memento monsters from grave as material

YGO Omega Bugs
1

  1. Bug description
    [Memento Fusion currently lets you use non-memento monsters from the grave as materials.]

  2. Bug reproduction steps

    [Write the exact steps to reproduce the bug. Provide a replay code if you can. You can attach replay codes, or use a pastebin link or you can even use a spoiler tag using]

    Spoiler

    your replay code

  3. Screenshot OR error code

  4. Expected behavior
    [Tell us what should have happened when the bug occurred.]

  5. What OS are you using
    [Windows-10 / Linux / Android]

2

Do you have a replay where this happened? I just tested it, and wasnt able to recreate this issue.

3

You most likely didnt destroy a card that turn