kensai 'bonded blade' 'piercing blade'
Kensai dedicate their lives to honing their skills with their weapon of choice. The best fight is a short one, and so they specialize in breaching the defenses of their enemies, to end them with a few powerful strikes. A kensai using a single weapon and no shield forms a near-mythical bond with their blade. This allows them to sense their foe's movement through their blade, and increases their chance to land a critical hit by +10%. The piercing blade skill allows a kensai to channel their kai into their weapon, causing it to puncture their opponent's armor with every critical hit (by an amount equal to their level). However, wearing heavy armor interfers with the channeling of kai, and the heavy armor penalty applies in full.