Demon Summoning (悪魔召喚 Akuma shōkan)

Demon Summoning, or Akuma Skōkan (悪魔召喚) is the ability to call upon four nature type Demons to fight alonside the Shinobi. For instance, Irai Akiyama has the Wind, Lightning, Earth and Water Demons. This means that theoretically Irai possesses all natures but combats others by summoning these immense demons.