The Daemon of Envy lives in the second cave. Children who visit his cave must first pass through the cave of the Daemon of Selfishness.
Because Santa Claus is so generous, the children of the world were contented and stayed away from the cave of the Daemon of Envy. He and his brothers kidnapped Santa Claus, hoping to sow unhappiness among the children of the world. Their plan failed when Santa's helpers were able to make the deliveries without him. ("A Kidnapped Santa Claus")