The Saradomin halo is an item worn in the head slot that can be bought from (or sold to) Lanthus for 300 gold Castle wars tickets. When worn, this item reduces the drain rate of defensive prayers by 33% of the normal rate. This is equivalent to a prayer bonus of +33.
The Saradomin halo acts as a Saradomin item and thus prevents Saradomin followers from attacking its wearer in the God Wars Dungeon.
The affected prayers are shown in the table below.