A gruagach (plural, gruagachan) is a Scottish hedge wizard of considerable power. They are, while not exactly common, are possibly as numerous as any House of the Order of Hermes in Loch Leglean. Several gruagachan are members of the Mac Gruagach Covenant, despite not being members of the Order of Hermes.

Rules for creating a gruagach and (canon) background are found in Chapter 4 of Hedge Magic Revised Edition.

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