It's a troll, it's a plant, it's a Trollplant! These Treasure Trolls are adorned with a live Caput Medusae airplant.
Tillandsia (Airplants) must receive bright light (avoid direct sunlight) and sufficient moisture. In place of natural light, a broad spectrum fluorescent light is recommended.
Tillandsias take up moisture and nutrients through their foliage, soak in a small bowl of water once or twice a week for several hours.