Water Blade

Water Blade (水刃) is an Art and Common Skill used by Rimuru Tempest.

Abilities
It can shoot out a thin water blade with tremendous cutting power.

Description
Following the principles behind Hydraulic Propulsion and Water Current Control, Rimuru (unnamed at the time) trained with the idea of "cutting water". After a week of practice, he had increased the pressure of his Hydraulic Propulsion's water gun enough to cut through a boulder, acquiring the skill. Water Blade, Water Current Control, and Hydraulic Propulsion then evolved into the Extra Skill Water Manipulation.

Trivia

 * In That Time I Got Reincarnated as a Slime: Isekai Memories, the "Rimuru Tempest [Reincarnated]" unit uses a Secret Skill variant called "Water Blade Torrent" (水刃乱雨).