Gu Ru Diva

Gu Ru Diva (Japanese: 獣魔吠グ・ル・ディーバ, Kanji translation: Beast Demon Howl, Romaji: gu ru dība) is a black magic summoning spell.

When casting the spell, the user draws several circles of light on the floor. Upon speaking the Power Words, a lesser demon is summoned into each circle, and obeys the commands of the caster.