User blog comment:Skeith9/Heroic Spirits Speculation/@comment-50.159.54.248-20140708210731/@comment-24754018-20140709111518

This page may be of relevance: Merlin on the minor character page.

And yeah, powerful as he may be, Merlin doesn't seem particularly combat strong, at least compared to Medea, being more of a non-serious trickster. He'd probably have some trick up his sleeve, but overpowered he likely isn't.