After saying the incantation and the name of the spell, the caster can unleash a bolt of lightning from the glyph. Its power changes depending on who uses it but is usually strong enough to create a considerable blast on an opponent, making it a dangerous spell if used in the right hands.
"What I seek is thunder. Izuchi! （求めるは雷鳴,イズチ！）(Motomeru wa raimei, Izuchi!)" is the incantation for the spell. Izuchi's glyph shape is somewhat different from user to user but generally consists of a cross-like shape over a circle.