Brother! Oh, brother!! Hee hee hee heh heh heh heh ha ha!! F-finally, the day has come when I get to chew apart my beloved brother’s body from head to toe. Heh heh heh. Ah ha ha. Ee hee ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha!!!!
~ The Black Maw upon being summoned by Kyousuke


The Black Maw is a special Material automatically summoned when a summoner makes a mistake during a battle and breaks a Taboo. Their summon will be forcibly changed to the Black Maw, a vortex of pitch-black slime that opens a maw filled with countless fangs. The Black Maw will then devour the summoner. It has a summoning cost of 21 and doesn't have a sound range, but it's very unlikely to be willingly summoned due to always trying to eat the summoner.

As revealed by Shiroyama Kyousuke, the Black Maw is actually one and the same with The White Queen. While the White Queen is the famous Material that everyone desires and apparently serves summoners with a smile, the Black Maw is the most hated Material that has eaten countless summoners. In fact, when summoned by Kyousuke, the vortex of black slime reveals her true form, a pitch black version of the White Queen with pure white eyes.

Powers and Stats

Tier: At least 5-B

Name: The Black Maw that Swallows All (nu – lp – eu – bf – zuh – ei – jkv – iu – a – xw)

Origin: The Unexplored Summon://Blood Sign

Gender: Female

Age: Unknown

Classification: Special Material

Powers and Abilities: Superhuman Physical Characteristics, Darkness Manipulation, Shapeshifting, Immortality (Type 2, likely Type 1), invulnerability to conventional weapons and pure physical damage, capable of fighting spiritual beings like ghosts

Attack Potency: At least Planet level (As powerful as The White Queen)

Speed: At least Subsonic, likely much higher (As powerful as the White Queen)

Lifting Strength: At least Class 10, likely much higher (Even the Original Series, the weakest Materials, can flip over a military armored truck)

Striking Strength: Planet Class

Durability: At least Planet level (Can trade blows with the White Queen, who's her other equally powerful side)

Stamina: Very High

Range: At least several dozen meters, likely higher

Standard Equipment: None notable

Intelligence: Average, probably higher

Weaknesses: Very arrogant

Notable Attacks/Techniques:

  • Invulnerability: Materials freely defy the laws of physics and achieve results not even a large army could, and they cannot be harmed by conventional methods such as thermobaric warheads or laser bombardments. Normal weapons are useless once a summoning battle starts, and summoners call in a Material, as they cannot harm a Material or a summoner defended by their protective circle. Thus, the only counter is for another summoner to step up and summon their own Material.
  • Darkness Manipulation: Though not a lot of details were given, as the Black Maw usually eats her summoners immediately, when fighting the White Queen she was described as using darkness to fight the White Queen's light.
  • Transformation: The Black Maw can change forms from a vortex of pitch black slime with a mouth filled with fangs to a dark version of the White Queen.
  • Bypassing the Summoner's Protective Circle: The Black Maw can ignore a summoner's protective circle to eat them.

Note: As she's actually the White Queen, it's very likely she has the same powers and skills the White Queen possesses.


Notable Victories:

Notable Losses:

Inconclusive Matches: