Getting the boss
Go to the sandbox mode and spawn it
Weak Spots
it has a weak spot: the tenticles(dont cut the feeding tenticles beacose it will spike you) and also you can use poisonus cells or a other mod that adds other cells(like that one that was made by OrdinaryReptile)
Extras
this is the triva part of this boss!
1: it shows on the icon and its hurt, so you can kill it
2: it is soft in the inside minus the throat and the stomac
3:it has a similar creature that is the vanpire squid