Final Fantasy III (NES): Amon Boss

Going deeper into Eureka, I found the powerful Fullmoon weapon on the ground. Thieves and the powerul Ninja class could use it. This, being an already strange discovery, triggered a boss. Amon, who happen to be a pallette swap of HYEN/HIEN, of all people. At first I freaked out about this, but when I started fighting him, he turned out to be easier than Hyne. He can still change his invincibility between your Fire, Ice, and Bolt magic, but physical attacks are decent against him this time. He can also kill you quickly if your not careful. Just bring the pain and keep the FullMoon.