Long story ahead. Terraria-inspired. Sorry about the poor drawings. This is my first time spriting editing and making fun with the pencil tool. Dedgeu'in is a cursed penguin that holds the some of the power of Skeletron Prime so that he could put waste to Humans. At phase 1, when the character is far from the penguin. Dedgeu'in almost looks like a normal penguin. But he carries a semi-invisible cloud that levitates him. His body also glows, but is not noticeable by a normal person. At phase 2, when the character is nearing the penguin. Dedgeu'in body glow turns to red and becomes brighter, the levitation cloud becomes noticable, his eyes become red. His wounds also appear. At phase 3, when you decide to attack the penguin. The penguins reveals his weapons, a cannon and laser given to him by Skeletron Prime. The cannon deals high damage and pushes the character back so powerful that the penguin cannot be sighted. "The Cannon is a weapon that uses some of Skeletron Prime's power to power the laser shot." The laser located at his mouth fires at a very high rate, it is capable of cutting through armor, and is very powerful. The laser does not push you back. "The Laser is a weapon cursed with demonic magic that tears the fabric of the very soul of a person." He may seem OP but he does not attack you, when you do not attack him. Because of his stealthy nature. TL;DR: A stealthy penguin that attacks you with 'not-so-OP' weapons when you attack him. If the game engine is complete and supports different variety of penguins. The penguin itself will also differ in appearance.
I don't know if this entry is legit, since you just used a sprite that was made by the Starbound team and edited it. Maybe you should ask a moderator or an admin if this is acceptable.
Yep, that was also what I was thinking earlier. I might redo it though. I will wait for confirmation at the main topic's page.