Aresblade, Kopis of Strife

Weapon (longsword/kopis), legendary (scales by tier) • requires attunement via the Trial of the Red Field
Counts as a longsword (1d8 slashing, versatile 1d10). This curved bronze-black kopis drinks light along its inner edge; faint runes spell the names of Phobos and Deimos.

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Attunement: Trial of the Red Field (hard)

Spend 4 hours under open sky on a training ground or battlefield with an offering of 100 gp in oil/bronze. Make all four checks; fail 2+ and you don’t attune (try again after a long rest with a new offering or after a MET service).

1. Athletics or Smith’s Tools DC 16 (temper the blade)

2. Intimidation or Religion DC 16 (call the War-God’s notice)

3. Sleight of Hand DC 15 (bind grip & blood-knot)

4. Constitution save DC 15 (endure the edge’s bite)

Your successes set your tier (and rarity).

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The Fury Engine (all tiers)

You have Fury dice you gain at the start of each combat and whenever you drop a hostile creature to 0 HP (1 die, up to your cap). Spend Fury for features below; you regain all spent Fury on a short rest.

• Fury cap: 2 (Dormant), 3 (Awakened), 5 (Exalted)

• Fury die: d6 (Dormant) → d8 (Awakened) → d10 (Exalted)

Deimos Strike (1/turn, on hit): Spend 1–3 Fury to add that many Fury dice to the damage; if the target is frightened, roll one extra Fury die (free).

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Tiers & rarity

Tier I — Dormant (Unproven)

Rarity: Rare; +1 weapon; Fury cap 2, Fury die d6

• Phobos Mark (free, 1/turn): When you hit a creature, you can mark it until the start of your next turn. While marked, it has disadvantage on attack rolls not including you.

• War-Cry (bonus, 1/SR): Allies of your choice within 10 ft gain temp HP = your PB and may move up to 10 ft without provoking OAs.

• Bloodstep (bonus, 1/SR): Teleport 10 ft to a space adjacent to a creature you’ve damaged this turn; the space you left becomes difficult terrain until your next turn.

• Parry of Bronze (reaction, 1/SR): Reduce damage from a melee attack by 1d6 + your PB.

Tier II — Awakened (Proven)

Rarity: Very Rare; +2 weapon; Fury cap 3, Fury die d8

• Phobos Mark → Fray: When you mark a creature, it must succeed a WIS 13 save or be frightened of you until the start of your next turn.

• War-Cry: radius 15 ft, temp HP = PB + your STR/DEX mod (min +1), and marked allies can also Stand from prone without extra cost.

• Bloodstep: 20 ft; the line you crossed becomes difficult terrain for others until your next turn.

• Parry of Iron: reduce by 1d8 + PB; if reduced to 0, you may make one weapon attack against the attacker.

Tier III — Exalted (Skyborn Champion)

Rarity: Legendary; +3 weapon; Fury cap 5, Fury die d10

• Aura of Phobos (passive): Enemies that start their turn within 10 ft of you make a WIS 15 save or become frightened of you until the end of their turn. A creature that succeeds is immune to the aura for 24h.

• War-Cry of Deimos (bonus, 1/SR): 20-ft radius; allies gain temp HP = 2×PB, may move up to 15 ft without provoking, and have advantage on their next attack this round.

• Warstride (Bloodstep+): 30 ft; after you arrive, you may spend 1 Fury to deal your Fury die in slashing to one adjacent creature (no action).

• Parry of Adamant: reduce by 1d10 + PB; on reduce-to-0 you may riposte (as above) and gain 1 Fury (cap still applies).

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Always-on properties (all tiers)

• The blade is magical.

• When you roll initiative, if you have no Fury, gain 1 Fury.

• You have advantage on saves vs being frightened while holding the sword.

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Tilt & virtue (optional rule, flavorful)

• War’s Favor: If you stand your ground while two or more allies are conscious and you are targeted by an attack you could have avoided by retreating, regain 1 Fury once per round.

• War’s Scorn: If you Dash away from a marked enemy while an ally within 30 ft is at or below half HP, the sword goes sullen: you can’t gain Fury until the end of your next turn.

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Versatile, Sap