AstralLein
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I don't know how to add a screenshot, but the sword is definitely from Enroth (Name in blue+9 attack+12 defense+7 knowledge+3 spirit). Map: The ruler of Erathia received it together with Frida (when he rescued her from prison).
This sword was added by the Legends of the Ancients campaign, seemingly as a replacement for the "Frida" artifact.