Spiritual guardian

Spiritual guardians are slayer monsters within Daemonheim. They requires a slayer level of 63 to harm and kill. They can be encountered on Furnished, Abandoned, Occult and Warped floors but encounters are uncommon. They are the only monster that can drop the Protector's ward and Guardian's ward shields, which are notable for their high magic defence bonuses. As with all slayer monsters within Daemonheim, an encounter is more likely if your party size and floor size is bigger. Contrary to popular belief, they are not affected by the Shadow silk hood.

As of 19 April, 2012, Slayer monster frequency in Dungeons has been increased by nearly double, making an encounter with Spiritual guardians a far more common occurrence on attempted floors than they previously were.

Trivia

 * When killed, they make a high-pitched "ping" sound.