The Rain Stone is an item found in Depth Chests within the Aquatic Depths which is used to begin the Rain Event. It can be used at any time, but costs 20 mana. The rain will last 5 minutes on average. If used while there is already rain, it will clear the rain.
- The appearance and tooltip of this item are based around Aquaius, The Endless Tide, one of the three bosses in The Primordials.