Medusa was an unreleased test enemy not designed for any particular world.
Medusa had a main feminine body with five snake tail segments that followed her. At the beginning of the battle, players could only damage the last segment of her snake tail. Once that segment was smashed, players could damage the next segment. This continued until only her main body was left, which could then be damaged directly. Once smashed entirely, Medusa dropped loot for players.
- Medusa was spawned in Nimbus Station by a Mythran named Shival on November 17, 2011 and again in Nexus Tower on January 3, 2012. On January 13, 2012, two Medusas were spawned in Nimbus Plaza but remained idle and neither attacked players nor took damage, although they could receive knockback from certain attacks. Many more Medusas were spawned at various locations on January 30, 2012.
- Medusa is based on the Gorgon Medusa, a monster in Greek mythology who had snakes for hair.