Pet Slime

The Pet Slime buff is caused when the player uses the Petri Dish item. This item can be used indefinitely.

The buff gives the player a slime follower, and lasts until the player cancels the buff or dies.

The blue Pet Slime as any other pet does not take damage, nor deal damage. It simply follows you as a vanity companion.

History
It lets off a light in the dark