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Phantom Blade Zero Ruthless Black: The Demonic Sword Phantom

By the Blade Zero Wiki editors

Updated

Phantom Blade Zero Ruthless Black is an Epic Phantom in the Phantoms summon-companion system. It has rarity 4, flame 4, and a base ATK +11 bonus. Its synced-skill perk is Demonic Sword, and its passive is Ruthless. It belongs to the Darkness and Light Phantom set. This page covers what the game page records and leaves acquisition details unstated; use Phantoms for the wider companion list.

Phantom Blade Zero Ruthless Black at a Glance

Ruthless Black is an Epic Phantom with rarity 4 and flame 4. Its base stat bonus is ATK +11, its perk title is Demonic Sword, and its passive title is Ruthless. The set line is Darkness and Light. These are the core labels to check before equipping it; the entry does not define flame 4 or list drop rates.

A short reading is that this Phantom is a rarity-4 ATK companion with an area-damage synced skill and kill-based healing. It does not add a separate weapon slot or talent tree in the documented entry, and the table below is the cleanest summary of its listed values.

Field Value
Rarity4
Flame4
Base stat bonusATK +11
Synced-skill perkDemonic Sword
PassiveRuthless
Phantom setDarkness and Light

What Phantom Blade Zero Ruthless Black Does

The Demonic Sword perk makes the synced skill summon the Demonic Sword, damaging targets in a large area. The damage is expressed as a variable percentage of ATK, so the exact percentage is not fixed on the page. The Ruthless passive heals the player upon defeating an elite and heals again upon defeating a boss; those heal values are also variable. The base ATK +11 applies as the Phantom's base stat bonus.

In practice, the effect package points to two jobs: clear groups with the summoned sword and recover health after elite or boss kills. Exact rank-by-rank perk and passive values are not available: Demonic Sword reads (var1)% of ATK, Ruthless reads (var1)% healing on an elite kill and (var2)% healing on a boss kill, and the source gives no filled-in numbers for those placeholders. A reader should treat the perk names, trigger conditions, and ATK +11 as the confirmed parts, not a hidden damage formula.

The synced-skill effect is tied to the Skill the Phantom is synced with, so the Phantom adds that effect rather than replacing the Skill. The passive is separate from the active effect: it triggers on defeating an elite and on defeating a boss. Those are the only trigger conditions stated in the entry.

Phantom context: memories, echoes, and item type

A Phantom is a special item type that syncs with a Skill and grants bonuses based on rarity and Phantom Set membership. In the Phantom World, Phantoms are memories and echoes of Kung Fu masters distilled by illusionists into tangible objects. Those masters may be dead or still living, and someone's own moves can exist as a Phantom, creating faint ripples across the ParaWulin. In that system, Ruthless Black is a named Epic entry with a set tag; it is not a weapon, a talent tree, or a gear slot.

That lore context matters because it frames the Phantom as a companion-like object rather than a normal equipment upgrade. The entry gives it a rarity, a flame, a base bonus, a synced-skill perk, a passive, and a set line. It does not explain how illusionists make this specific Phantom or whether the represented master is living or dead.

Darkness and Light set context

For Phantom Blade Zero Ruthless Black, the set line is Darkness and Light. The documented Combo Chains synergy is Ruthless Black plus Merciless White at the same time: DMG +15% and DMG reduction -30%. The only activation condition stated for that pairing is having both Phantoms on Combo Chains at the same time. The set also lists entries under the label 2 Evolved Flames. One line gives DMG dealt +30% and DMG reduction -30%; another line gives DMG dealt +45% and DMG reduction -30%. This page records both lines as written and does not reconcile them.

Because the two 2 Evolved Flames lines differ, do not treat either one as a corrected value unless another page documents the change. The safe reading is that Darkness and Light is the set name, Ruthless Black plus Merciless White is the documented combo pairing, and the 2 Evolved Flames lines are listed exactly as the wiki shows them.

When to equip Phantom Blade Zero Ruthless Black

Equip it when you want the ATK +11 base bonus, the Demonic Sword area-damage synced-skill effect, and Ruthless healing from elite and boss defeats. It is also the documented partner for Merciless White on Combo Chains, so it fits a Darkness and Light setup that wants that pairing. This is a conservative recommendation, not a best-in-slot claim; the entry does not publish drop rates, unlock steps, or tier rankings.

Tier lists may disagree because the page gives effects but not fixed percentages, rankings, or acquisition costs, so this page does not assign a rank. For the comparison with other rarity-4 phantoms such as Merciless White, the only documented relation is the Combo Chains pairing: Ruthless Black plus Merciless White at the same time gives DMG +15% and DMG reduction -30%. The entry gives no full stat-by-stat comparison against other rarity-4 phantoms. Flame 4 is simply the recorded flame value; the source does not define what flame 4 means in gameplay terms.

The wiki entry labels it an Epic Phantom in PBE, which points to Phantom Blade: Executioners rather than a Phantom Blade Zero-only status; this page does not claim a confirmed Phantom Blade Zero acquisition path beyond what is recorded. The total number of phantoms in Phantom Blade Zero is not established by this entry, so Ruthless Black cannot be placed at a numbered spot in a full list from this source alone.

For a practical lineup, treat Phantom Blade Zero Ruthless Black as a documented Epic option whose value comes from ATK +11, area damage, and kill healing. If you need a confirmed acquisition route, wait for documented details; the entry does not provide them.

Frequently asked questions

What are Phantom Blade Zero phantoms?

Phantoms are summon-companion-style items that sync with a Skill and grant bonuses based on rarity and Phantom Set membership; in lore they are memories and echoes of Kung Fu masters distilled by illusionists.

What are Ruthless Black's rarity, flame, and base bonus?

It has rarity 4, flame 4, and a base ATK +11 bonus.

What does flame 4 mean on this Phantom?

The entry records flame 4 as the Phantom's flame value; the source does not define what flame 4 means in gameplay, so any elemental or tier meaning is unconfirmed.

What does the Demonic Sword synced-skill perk do?

It makes the synced skill summon the Demonic Sword, damaging targets in a large area for (var1)% of ATK; no exact rank-by-rank value is published.

What does the Ruthless passive do?

It heals for (var1)% upon defeating an elite and (var2)% upon defeating a boss; exact percentages are placeholders, not published numbers.

Is Phantom Blade Zero Ruthless Black part of a set?

Yes; it belongs to the Darkness and Light Phantom set, and the documented pairing is Ruthless Black plus Merciless White on Combo Chains at the same time for DMG +15% and DMG reduction -30%.

When should I equip this Phantom?

Equip it when you want ATK +11, the Demonic Sword area effect, Ruthless healing from elite and boss kills, or the documented Merciless White Combo Chains pairing.

How do you get Phantom Blade Zero Ruthless Black?

The wiki entry does not document how to obtain it.

Does it pair with Merciless White?

Yes; having Ruthless Black and Merciless White on Combo Chains at the same time gives DMG +15% and DMG reduction -30%.

Sources