Globe of Blades (SPYANCD)

The Globe of Blades (SPYANCD) spell was introduced as part of the Baldur's Gate II: Throne of Bhaal game expansion.
This spell isn't castable by any party member in the game and is provided to the elemental "princes" Chan and Yan-C-Bin only.
==Gameplay==
For a player who casts the High-level class ability spell Elemental Summoning or Greater Elemental Summoning and via a random d100 probability calls forth Chan the 'good' aligned prince/princess of Earth, then while Chan is available the creature is bestowed a permanent "Glone of Blades" effect protection.
If the evil aligned Prince of Air, Yan-C-Bin, is encountered in the game, the creature also has the same permanent globe protection as well.
This spell is a near clone of the priest's High-level class ability spell Globe of Blades, with a few changes made to it.
The elemental's globe is permanent, and there is no practical method to remove it or stop it from triggering - the party can't dispel it, and a Breach won't remove it either.
Any attack on the elemental prince will trigger 10d10 retaliatory Slashing damage upon the attacker, although a Saving throw versus Spell (with a 2-point penalty) is allowed to avoid the damage.
The retaliatory damage is triggered by a melee, missile or single-target spell cast that strikes the elemental and is applied if the attacker is within 5-6 feet distance from the elemental - if the attacker is further away than that, the globe won't apply the damage.
The slashing damage is non-magical, so it can't be blocked by Magic resistance, and the damage has a 0 Power level, and that precludes using a Spell protections type defense such as Shield of the Archons, or Spell Trap - however, a Spell Immunity: Evocation will block it.