Father has discovered a doorway into a new world with new souls to sacrifice to create the ultimate Philosopher's Stone. After wrecking havoc throughout several villages, Aang reunites his team with new members to stop the Homunculi from ending all living beings.
- Homunculi from Full Metal Alchemist: Brotherhood
- Envy cannot go into his ultimate form
- Team Avatar understand that the Homunculi are extremely dangerous and are prepared to stop them by any means
Can Aang and his team stop the Homunculi?