King's Oath is a unique claymore that paralyzes an opponent while inflicting both regular and magical damage. Each strike made with this weapon also damages the wielder with fire. This two-handed weapon is available during the main quest.
Enchantment ID: King's Oath_PC_EN
All magic effects are cast on strike for 3 seconds:
Tienius Delitian at the Throne Room of the Palace enlists the Nerevarine's help in tracking down the elusive author of The Common Tongue and stop the writer from distributing the defamatory newsletter by any means necessary. The Nerevarine is offered the King's Oath along with a sum of gold as a reward of the quest, unless they killed Trels Varis. If they killed him, they are only awarded with the gold.