Rotten Brain

The Rotten Brain is a Pre-Hardmode, Expert Mode-exclusive accessory obtained from the Treasure Bag dropped by The Hive Mind. It will grant a 10% increase to all damage types when below 75% hp, decrease movement speed by 5% when below 50% health and makes shade rain down on you when you are hit. It is also sold by the Dryad after The Perforators are defeated.