Stone Hull

4th-level transmutation

Casting Time: 1 minute

Range: 120 feet

Components: V, S, M (a piece of pumice or sandstone)

Duration: 8 hours

You reinforce the timbers of a ship’s hull against all attacks and natural hazards. The ship gains immunity to bludgeoning, piercing, and slashing damage from nonmagical attacks, and its hull gains 40 temporary hit points. The ship gains a +2 bonus to AC, saving throws, and ability checks to avoid aquatic hazards. Checks made to capsize the ship, burst through the hull, or otherwise move or impede the ship suffer disadvantage. A stone hull reduces a ship’s speed by 10 feet, and ability checks made to turn the ship take a -4 penalty.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the ship’s hull gains 10 additional temporary hit points for each slot level above 4th.

If you cast this spell using a spell slot of 7th level or higher, the bonus to AC, saving throws, and ability checks to avoid hazards increases to +4, the ship’s speed is not reduced, and ability checks to turn the ship do not suffer a penalty.