The Frost Ancient Core is a semi-translucent, glowing blue orb with intricate Norse runes etched into its surface, pulsating with a faint icy aura. Its core is surrounded by jagged, frost-covered metallic shards that seem to hover ominously around it, giving it a menacing yet mystical appearance. The material resembles a combination of enchanted ice and ancient metal, with a glossy, reflective finish that catches the light to create a dazzling effect.