Heezlewurst's creates a shield against elemental magic depending on the type of crystal used. The buffer spell can be used to protect yourself in combat against other wizards or creatures with elemental attacks, or from backfires of your own spells.

Casting the spell on the red crystal protects you from fire, such as pragi's and kof. Blue protects you against cold, green against acid and yellow against noxious fumes. Using all four as the focus protects you somewhat against plasma, ie. NES.

 

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