The Mana Overloader is an Pre-Hardmode, Expert Mode-exclusive accessory obtained from the Treasure Bag dropped by the Slime God. It increases the player's maximum mana and magic damage as well as providing lifesteal from magic attacks when the player is below 10% mana, making it useful well into late-Hardmode. However, the Mana Overloader will continuously drain 3 health per second while its wearer is above 50% mana. This drain can be counteracted by any sources of health regeneration, such as Life Jelly or Crimson armor.
- The health drain effect directly subtracts from any life regeneration the player has. If the player naturally regenerates less than 3 health per second, the Mana Overloader will cause continuous damage over time while its user is above 50% mana.
- The health drain of the Mana Overloader is considered a damaging debuff, which can activate the defensive bonuses of the Crown Jewel.