This is where the document shines. Combat in HarnMaster is not an abstraction; it is a deadly dance of geometry and physics. The PDF outlines a combat system that is hex-based and tactical.
Magic in Kethira is governed by the Pvaric philosophy—six elements/concepts (Fire, Water, Earth, Air, Spirit, Metal) arranged in a wheel. A mage can only master their primary convocation; to cast outside it, they must "travel" around the wheel, incurring massive penalties. The PDF explains why magic is subtle and terrifying. HarnMaster Roleplaying in the World of Kethira.pdf
The system is infamous for three things: This is where the document shines