Death Storm

Death Storm (黒雷嵐) is an Art used by Ranga. It is made from the combination of Black Lightning and Wind Manipulation.

Abilities
After having achieved the form he had been told to aim for by his master Rimuru Tempest, Ranga directed his magical energy into his horns and roared, by taking advantage of the differences in temperature and atmospheric pressure, creating a writhing maelstrom of upward and downward air currents from combined Wind Manipulation and Black Lightning to form many pillars of lightning to appear, connecting the heavens and the earth, as well as a winding waterspout with a devastating range.

The storm may be fully directed in a way to avoid one's allies. There is also a single-target version of it that focuses all the destructive energies from the storm into a single enhanced Black Lightning bolt. It was able to vaporize an Orc General in an instant, as well as defeating many surrounding orcs. Ranga later used the single target version on the Orc Disaster Geld.

Trivia

 * In That Time I Got Reincarnated as a Slime: Isekai Memories, the "Ranga [Tempest Star Wolf]" unit uses this as a Secret Skill.