Rain is a Diablo 2 Resurrected runeword created by combining ort + mal + ith into a 3 socket body armor. It requires at least level 49 to equip.
Rain has a 5% chance to cast a level 15 Cyclone Armor when struck. When active, Cyclone Armor absorbs a flat amount of elemental damage. It can be seen as the elemental equivalent of Bone Armor
|Cyclone Armor level|
|damage absorbed by shield||160||172||184||196||208||220||232||244||256|