Spiritual mages are an ~82 slayer monster which are highly killed to get the rare drop dragon boots. The most common way of killing one is melee with a chaotic weapon the armour is most commonly void.
They are located at godwars dungeon. They are a part of the saradomin army. You can get there using a games necklace (dungeon 2, God wars dungeon).
1 in like 17-30kills
|Death rune||Very common|
This wiki post is made by irjames sorry if its not enough information for you.