Malsumis

The Malsumis is the most brutal of Makamou, a scorpion with stag beetle pincers in place of claws & a spider's face. The Malsumis is able to fire needles from its stinger, & was nearly invincible except for its mouth, though a sacrifice is needed to hit it at its weak point. It appears every decade, last appearing as Bloodied Demon's final opponent, whom she swore to kill for murdering her parents a decade earlier. She attempted to hit its weak spot, resulting with Slashing Demon being mortally wounded & her being banned as the Malsumis went into hiding.

Ten years later, the Malsumis resurfaces, feeding on humans. It evaded Judgement Demon & later fought Roaring Demon & Armed Echo Demon until Bloodied Demon arrives to finish her decade fight, until the Malsumis escaped yet again. It would later appear again & pursued Diana, close to eating her as Shuki intended. But Zanki resumed his Demon form to save Diana, only for the Malsumis to eat Shuki. However, Shuki managed to get her revenge, fatally wounding herself to incapitate the monster for an enraged Slashing Demon to finish it off with his Thunderbolt Beheading Quake.

Etymology
According to Abenaki, Algonquin, & Penobscot legend, Malsumis, also known as Malsum, Malsum, & Marten, is an evil god of petty crime & cheap tricks.