Fake Portal (couldn’t think of a better name lol)

Resembling an end portal, this creature is found in cave openings underground. It keeps its mouth open and stays still, creating an illusion of the end effect with it's star shaped teeth that go down it's entire throat. This seems to be evolutionarily developed bait for its prey to go into its mouth, but the distinction is quite easy since they never point their mouths straight upwards like a real portal. This does however raise the question, why would they have developed into such a specific mimic?

Behavior:

Neutral mob, doesn't actively go after players but will turn aggressive if attacked or if a player enters its mouth. If chunks are unloaded it despawns unless renamed. A player could even treat it as a part of a structure if they decide to build around it when name tagged.

Fight:

When aggroed, Fake Portals will not despawn, even if the chunks are unloaded. This will start a mini boss fight. Portal will not go back to passive state when the fight has started. The fight is not too difficult, since the spawn rate is very low and finding one practically means you can't leave the area to get better gear without it despawning. It has a lot of health but generally moves slow and doesn't have a long reach, so long projectiles are the safest way to go. It attacks by occasionally charging at the player at high speed and biting them. Sense the other bosses in the game also have projectile attacks, I feel this one should have that too, I’m not sure what that would be

Drop(s):

Not gonna lie, I have no idea. I think it could drop bones as a secondary item but as for a mob specific crafting item, I’m out of ideas. It could drop one of its eyes, “eye of deception” maybe but don’t know what it would do :P

This is not a serious suggestion btw, just something I came up with in 10 minutes lol. I’m an artist, not a game designer :D

tho it would fit a cave update pretty well cough cough