Quartile Flagellum

Star Magic: Quartile Hasta (星魔法『・』) is a Star Magic spell.

Description
With an open grimoire, the user extends a line of starlight from their hand and connects four stars. The user then swings the line like a whip. The whip is so thin and sharp that it easily cuts through people and walls.

Trivia

 * Flagellum is Latin for "whip".