The Sylvan Hood is a helmet armor added by Roots. The Sylvan Hood will automatically repair when equipped; each tick, there is a 1/80 chance of one durability being repaired, or a 25% chance of one durability being repaired per second. Additionally, when the full armor set is worn, Spells created will be created with double the "efficiency" (durability).
With your new, stronger altar, you might want your apparel to follow suit. Using some leather armor as a base, you have managed to create a form of magically-cooperative robe. This equipment doesn't have the best protection, but it will auto-repair and boost the efficiency modifier of your spells by two.
— Runic Tablet
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