This magic weapon has a cursed history. It is told that it was forged by the Dwemer under a forced decree. While they forged it, the smith who made it went against the usual ways of the Dwemer and dealt with a Daedra to curse the blade and the one who wielded it.
Dormant State
This weapon counts as a +1 greatsword (2d6 slashing damage).
On a Nat 20, it deals a bonus 1d8 psychic damage. On a Nat 1, it deals 1d8 psychic damage to the wielder.
Tyrfing has 2 charges. Each charge can be spent to utilize a special ability as described below:
Sign of Ill Omen: At the cost of 1 charge, cast the spell Bestow Curse on your target without using any material components or spell slots.
Minions of Chaos: At the cost of 1 charge, summon a Hound of the Wild Hunt to fight for you. Only one Hound may be active at a time. If a hound is summoned and another is already active, the effort fails and the charge is lost.
Cursed: Upon being drawn, a random target within 5 feet of the wielder is attacked. On a hit, roll a d100. On a roll of 90 or higher, the target is struck immediately unconscious.
Awakened State
The bonus to attack and damage rolls increases from +1 to +2.
Critical ranges are enhanced and bonus damage is increased. Critical success is now 19 or 20. On a critical success, it deals a bonus 2d8 psychic damage. Critical failure is now 1 or 2. On a critical failure, it deals 2d8 psychic damage to the wielder.
Tyrfing gains 1 additional charge (Total: 3) for the use of activating its Sign of Ill Omen or Minions of Chaos features.
Exalted State
The bonus to attack and damage rolls increases from +2 to +3.
Tyrfing gains 2 additional charges (Total: 5) for the use of activating its Sign of Ill Omen or Minions of Chaos features. Additionally, it gains access to the Soul Trap spell.
Even while alive, you register also as undead. If you die while attuned to this weapon, you return as an undead creature, and your soul is trapped in this state, unable to be resurrected in any way.
The curse can only be removed with a successful Wish spell. The Attuned is aware of the curse but cannot speak of it and is unwilling to part with the weapon upon attunement.
This weapon is also a Pact Weapon, tied to a pact with the Daedric Prince Arawn, the father of Hircine, whose Daedric spirit is bound within the weapon. Those that attune to the weapon forge a pact with Arawn and will be given requests that will lead down a path towards the efforts to release Arawn's spirit so that he may retake physical form outside of his realm of Oblivion.