Slime Sinkhole

Slime sinkhole is a structure generated only in swamps. This is the structure to obtain slime rods.

General Structure
Slime sinkhole is a sinkhole with an entry above the ground. The structure is mostly underground but it's fairly recognizable from the ground due to a stone entry point. It contains several parts.

Parts of slime sinkhole

 * Control stations
 * Spawner room
 * Witch room
 * Boss room

Locate the boss room

 * Find the slime sinkholes in the swamps
 * Get in the sinkholes
 * The boss room is the tallest room in the sinkhole (usually 3 floors)

Fight the slime core

 * Once you get in the boss room, the slime core will be at the highest floor
 * It won't move or attack you unless you attack it first. Feel free to set up your plan.
 * When you're ready, attack it.

Tips and Warnings

 * Slime core doesn't move or attack but spawn a lot of slime cubes when take damage. Once the slimes spawn, deal with them first.
 * Your armor should have Thorns as the amount of slimes spawn in a wave is so high you can't kill them quickly enough to not take any damage.
 * Don't rush this boss or you'll be overwhelmed by tons of slimes.  You are warned. 
 * Stacking up before the fight can be very helpful, as slimes can only jump so high.

Slime rods
A carrot on stick that launches slimeballs, inflicting slowness on the target.

How to obtain: Kill the slime core