Jigoku No Soko No Ha (5e Equipment)
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Weapon (okatana (A katana with a longer blade- use the stats of a longsword).), artifact (requires attunement by a creature with a non-lawful, non-good alignment.)
Forged by the Grand Oni: Akuma No Hidarime, this masterfully-crafted black blade is longer, thicker, and wider than a traditional sword; the blade measures 95 centimeters in length, and is twice as thick and half again as wide a normal katana. Its hamon (the wave like line close to the edge of the blade) is dark blade, resembles a waving flame, and runs parallel to an inscription in the blade, written in a long-long language with a substance of the same dark blue color. The habaki (wedge shaped metal collar) is silver with a blue sakura flower engraved on it, the tsuba crossguard is diamond-like in shape, with fine inlay resembling coiling dragons, and the wrappings along the handle are made from silver ray skin, black leather, and silk. A pair of menuki ornaments adorning the hilt each resemble six-headed snakes, and the kashira butt-cap of the handle, in turn, depicts a two-headed oni. Though the blade has no fuller, blood seems to slide cleanly off of it without fail, and any scabbard that is used to hold it is damaged beyond usability in short order by its unblunting, impeccably sharp edge.
Forged from the insides of a Lord of the Underworld known for his insatiable thirst for war, carnage, sex, and blood, and whose name has been lost to history, the Jigoku No Soko No Ha has, for all its fine craftsmanship, come to be the recipient of a dreadful curse. This Underworld Lord's psyche- and unsated thirst- transmigrated into the blade after its completion, and survive to this day...
Vorpal Edge: The blade is impossibly sharp, and possesses all of the properties of a Vorpal Sword. These include:
- You gain a +3 bonus to attack and damage rolls made with this magic weapon. In addition, the weapon ignores resistance to slashing damage.
- When you attack a creature that has at least one head with this weapon and roll a 20 on the attack roll, you cut off one of the creature's heads. The creature dies if it can't survive without the lost head. A creature is immune to this effect if it is immune to slashing damage, doesn't have or need a head, has legendary actions, or the GM decides that the creature is too big for its head to be cut off with this weapon. (At the GM's Discretion, a Player Character may not be vulnerable to this instant decapitation, either.) Such a creature instead takes an extra 6d8 slashing damage from the hit.
Zandatsu: Upon either reducing a target to 0 HP with a weapon Attack made via this weapon, or upon killing them outright (such as via its Vorpal property), you may expend your Reaction to tear into the creature, and absorb its "core" to replenish your own strength. This not only instantly kills the target, it prevents them from ever being raised or resurrected, by any means short of a Wish spell or divine intervention. You also heal yourself 1d6 + the target's Challenge (rounded down) (spare healing can be converted into temporary Hit Points that last for up to 3 rounds) upon doing so, in addition to gaining a +2 to Attack checks and Armor Class for 3 rounds.
Traversing the Underworld: Creatures attuned to this weapon gain Resistance to fire, lightning, poison, and necrotic damage, and Advantage to all Ability Checks or Saving Throws related to navigating the natural hazards of the Abyss, the Nine Hells, or any similar Lower Plane.
Curse - Insatiable Thirst: Whenever a creature becomes Attuned to this sword, the Sigil of the Lost Underworld Lord will appear on their body (at a location of the the DM's choosing); once it appears, this Sigil cannot be removed by any known means. One day after the Sigil appears, the blade may choose to activate a Rage on behalf of the wielder, in response to them either scoring a Critical Hit against a target or activating Zandatsu. If they do so, this Rage functions as per a Path of the Berserker Barbarian of the wielder's own level, including the Frenzy feature should the wielder be Level 3 or higher. While enraged, the wielder considers all units enemies, and will attempt to attack all units (though may still prioritize whoever it chooses.) The wielder may, at the end of each turn they attack an ally, make a Wisdom Saving Throw (DC: 20) to end the effect early- otherwise, it ends whenever a Rage normally would. The Blade may only activate a rage this way once per day.
Each time the wielder Rages in this way, after its resolution, they must make an additional Charisma Saving Throw (DC: 20) as well. On a failure, their Alignment shifts one step towards Chaotic Evil. A target that is already Chaotic Evil is instead drunk on pride, following their grisly handiwork; they become Immunity to being Frightened and Advantage to all Charisma checks, but also Disadvantage to all Wisdom checks, for 10 minutes thereafter, or at the end of their next turn during an active Combat Encounter.
Sentience. The soul inhabiting the Jigoku No Soko No Ha is Chaotic Evil, and has an Intelligence of 21 (+5), a Wisdom of 28 (+9), and a Charisma of 26 (+8). It can see and hear as per a person, in all directions around it, and- while it understands all spoken languages- it can (or at least, has been seen to) only speak in Abyssal, and only directly into the wielder's head, in a manner similar to telepathy.
Personality. The soul within this blade is an unrepentant warmonger that revels in spilling blood and sowing anguish. It will try to goad its wielder to follow his path in their own life. However, it is most impressed by the pure of heart, who wield it and reject its temptations, with a strong disdain for the vain and arrogant; in particular, it loathes those who attribute their triumphs with the blade as their own, when in it is clear that the blade is what allowed them that opportunity to begin with.
Destroying the Jigoku No Soko No Ha (Blade of the Infernal Abyss). This item cannot be destroyed by any known means.