Lings and acid

[Shoddy]

Changelings are predatory lifeforms from somewhere in deep space, they don't work together because they are constantly trying to get DNA in whatever means possible, and if there is competition, they must die.

Basically lings are sentient aliens who eat like animals.

besides, its pretty fucking sweet when the guy you just ate as your seventh turns out to be a changeling full of 10 other people.