The Black Dragon Wyrm (Dragon Wyrm') was a unique creature of the Gnome Underground. It was a dragon who's hide was impervious to ranged attacks. Connor had to fight the huge beast in hand to hand combat. He found out that it guarded the Chamber of Enlightenment. After Connor kills it, he is able to get its black diamond heart which later becomes an integral part of the Black Diamond Pike used to slay the Basilisk.