3rd-level · Abjuration
Casting Time 1 action
Range Touch
Components V, S, M (a seed encased in ice or glass)
Duration Up to 1 hour (concentration)
When you cast **protective ice**, you encase a willing target in icy, medium armor equivalent to a breastplate (AC 14). A creature without the appropriate armor proficiency has the usual penalties. If the target is already wearing armor, it only uses the better of the two armor classes.
A creature striking a target encased in **protective ice** with a melee attack while within 5 feet of it takes 1d6 cold damage.
If the armor’s wearer takes fire damage, an equal amount of damage is done to the armor, which has 30 hit points and is damaged only when its wearer takes fire damage. Damaged ice can be repaired by casting a spell that deals cold damage on it, on a point-for-point basis, but the armor can’t have more than 30 points repaired.
When you cast this spell using a 4th-level spell slot, it creates splint armor (AC 17, 40 hit points). If you cast this spell using a 5th-level spell slot, it creates plate armor (AC 18, 50 hit points). The armor’s hit points increase by 10 for each spell slot above 5th, but the AC remains 18. Additionally, if you cast this spell using a spell slot of 4th level or higher, the armor deals an extra +2 cold damage for each spell slot above 3rd.
Source: Deep Magic 5e · OGL/Open