Of Ships And Sea Text
By means of this spell, the caster fills the skin of an affected creature with a chitinous substance, which hardens to form a layer of armor. The base Armor Class of the protected creature becomes 4, plus an additional 1 to AC for every 5 levels of the priest: the base Armor Class 3 at 7th level. Armor Class 2 at 10th level, Armor Class 1 at 15th level, and so on. In addition, the affected creature makes all saving throws against nonmagical attacks at +1.
Notes: Uncommon for sea priests; otherwise, very rare.
Sea of Fallen Stars Text
This spell covers the skin of the recipient with a substance that hardens to form shell-like armor. The base armor class of a creature protected by this spell is AC 4, plus an additional +1 AC bonus for every five levels of the caster. A 7th-level caster would grant the recipient an AC 3, a 10th-level caster would grant an AC 2, etc.