Indura「インデュラ Indura」 is the true nature of demons that possess seven hearts and a power level exceeding 50,000.
Indura are varied in appearance, resembling monsters, chimeras, or mutated animals.
In order to attain their Indura form, a demon makes a contract with the darkness, sacrificing six of their seven hearts as well as their ability to reason. The resulting beast possesses immense magical power and slowly turns into an ominous figure as time passes.
Known as "legendary beasts", the Indura are widely feared even within the Demon Realm, and are known to come in different types. The Indura resulting from the Commandments who got the decrees bestowed upon them by the Demon King are called the Induras of Favor (主恩, Shuon).
Indura bearing other titles such as Ashes (灰燼, Kaijin), Time (星霜 Seisō), Resentment (怨嗟, Ensa), Thunder (遠雷, Enrai), or Retribution (業報, Gōhō) are still roaming around the Demon Realm.
The Induras are noted to possess absolutely massive power; when Derieri and Monspet transformed into their Indura Forms they both possessed enough power to overwhelm and nearly kill three of the Four Archangels of the Goddess Clan. Even Meliodas, the former leader of the Ten Commandments, stated that the only "real" way to defeat them was to simply allow them to rampage to their heart's content until they simply kill themselves from exhaustion, further proving the depth of their power.