Derisive Heart of Steel (嗤う鉄心, Warau Tesshin?, localized as "Icy Sneer"GO) is a Skill of the category of Mental Pollution, conferred as of the Servant's standing as an Alter (反転, Hanten?, lit. "Reversal"). Differing from Mental Pollution, the Skill functions by the imposition of an invariable Concept, approximating to a mode of self-indoctrination. The pattern of reasoning imposed holds the defense of the Human Order as the utmost priority, and deems as acceptable the abdication of all else per the modus operandi of the Guardians (守護者, Shougosha?).
| Rank | User(s) |
|---|---|
| A | EMIYA (Alter) |
| If not conferred as of a Rank of A, the strength that this man can bring to bear in his capacity as an Alter cannot be expressed. |
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