The term 'TROLL's Cousin' refers to two mythical creatures, the GNOME and the OGRE. The GNOME is a small humanoid creature that lives underground and is known for its mining skills. The OGRE is a large, brutish humanoid creature that is often portrayed as being violent and aggressive. Both the GNOME and the OGRE are related to the TROLL, which is another mythical creature that is usually depicted as being mischievous and malicious.