Great Sea Guardager (Boss Suggestion)

The GSG would sort of resemble a dragon? I don't know.

The way to awaken the GSG is to find the shrine thing, (Its located deep in the sea) place the heart of the sea item thing in the chest in the middle of the shrine, the GSG awakens. 

The GSG would have 3 different phases.

Phase One: It would just swim towards the player and hurt them. It can also shoot out poisonous spike things from its... uh, long ears? Overall, pretty basic phase.

Phase Two: It can let out a tremendous scream which will make the player lose their hearing. (I know kind of useless) It can also sort of shoot out little baby versions of itself from its stomach? (I don't know) It also can use its tail to blast the player away.

Phase Three: It now actually can come out of the sea and can attack the player. (It sort of changes, like it grows arms and legs and becomes thicker, like a bullfrog or something) It also can shoot water from its mouth. It can also scream, but when it screams, it will summon 3 things which will float around and shoot at the player. It actually eats passive mobs and mobs in this phase. (When eating the mobs, it will regenerate health) 

(The GSG would also drop Items, but I'm not sure what Items the GSG could drop)

(I'm not great with sea dragon type stuff)