- If an "X-Saber" monster's Level changes, then the ATK increase/DEF decrease also changes accordingly. For example, if its Level increases, then increase its ATK.
- If a face-down "X-Saber" monster is attacked, then you applied the effect of "Saber Vault" when you flip the monster face-up.
- Konami OCG FAQ: Spell Card > Saber Vault
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