The Tiny Thundercloud is an Item that can only be found in the form of Golden Pupa loot. Upon being picked up, a cloud will orbit around the player and zap a any nearby Enemies. This zap will reduce the current health of that given Enemy by 25%. This is unless the Enemy is a Boss, in which case the zap will not reduce their health by 25%. Due to how Tiny Thundercloud does not appear within the player's Inventory, it is not possible for it to appear in the Time Capsule.