Dark Cloaked Iai Slash

Mana Zone Condense: Dark Cloaked Iai Slash (マナゾーン凝縮『闇纏・居合斬り』) is a Dark Magic spell.

Description
With an open grimoire, the user sheathes their sword, condenses the area of Black Moon's effect, and waits for their opponent to attack. Once the opponent is in range, the user coats their sword in darkness, quickly draws the blade, and dashes forward, slashing the opponent across the stomach.

Trivia

 * Iaidō is a Japanese style of swordsmanship that emphasizes awareness of one's surroundings and drawing one's sword swiftly and smoothly in response to a sudden attack.