Shield dome reduces melee, magic, and ranged damage, as well as typeless damage that can be affected by defensive abilities. Shield domes cannot be layered on top of each other, and new shield domes affecting a player will have the damage reduction reduced by 25%, then 12%, 6%, 3%, and 1% until two minutes have passed since the first shield dome was cast. Unlike other Seren group spells, Ironmen can use Shield Dome (from 26 June 2017). This spell can't be used in Fist of Guthix.