A slowly moving ball lightning with a bright, electric blue glow. The lightning is spherical, with tendrils of energy subtly emanating from its core, creating a smooth and calm movement. The scene is set against a completely transparent background, allowing the focus to be on the lightning's delicate electric tendrils and slow motion. The glowing orb should appear as if it is drifting through the air, with a faint halo of light around it, while the overall effect remains serene and mesmerizing