Overload (オーバーロード, Ōbārōdo?) is a Skill that grants an additional boost while the user accepts the fact that it inflicts damage upon him or herself.[1]

Rank User(s)
C Frankenstein
In Frankenstein's case, she converts the magical energy collected by Galvanism to an amount more than what is allowed, increasing the attack power of her Noble Phantasm by outputting all of the magical energy. Because her body cannot handle it, she suffers damage.[2]
D Charles Babbage
In Babbage's case, he allows the steam machinery to go wild, boosting its output and increasing the attack power of his Noble Phantasm. The wild machinery inflicts damage to itself, and since Babbage has become one with his armour, it inflicts damage to him as well.[1]
Servant Skills
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