Hell Invocation.

Cursing to himself, Leo, without further ado, clicked the accept button in front of him, causing the dark, heavy lid of the ancient cauldron to suddenly close with a loud bang. Sizzling and trembling as it began exuding a bright, yet foreboding light, making his sight momentarily affected.

Tremble~

Slowly, the surface of the churning cauldron began to change, transitioning between the hues of gray and black as it gave off a mysterious aura that shook Leo's soul.

Its exquisite design also began harboring a dangerous vibe as it pulsated unceasingly, as if about to explode at any second, causing Leo's expression to be filled with unease.