The reddish-brown something that had flowed into the Heroic Spirit’s body along with the power of the Command Seals were eating away at it. The Heroic Spirit released magical energy of his own to oppose it, blowing away more than half the barriers around the workshop. Several of the mages, bombarded by more magical energy than they could handle, collapsed twitching.

Fate/Strange Fake: Volume 3, Prologue VIII