The Umbral Shard is a high-fantasy anime-inspired crystal fragment with a dark, translucent core that pulses with a faint violet glow. Its jagged, asymmetrical form is encased in a swirling aura of shadowy energy, with intricate, glowing runes etched into its surface that occasionally flicker like distant stars. The shard's surface is smooth yet subtly textured, resembling polished obsidian with veins of luminescent purple running through it, giving it an otherworldly and mysterious appearance.