The Abstruse Sigil is a medium-sized, ornate artifact with a complex geometric design, featuring interwoven angular patterns that glow with a faint, eerie luminescence. Its surface is smooth yet intricately engraved with arcane symbols, suggesting its use in powerful magical rituals. The sigil's primary material appears to be a dark, polished metal with a reflective finish, accented by glowing runes that pulse with energy.