Tarrasque Plate

This impenetrable armor is made from refined fragments of a tarrasque's armored hide and retains some of its original properties. You have resistance to damage from spells and a +1 bonus to AC while wearing this armor. In addition, whenever you're targeted by a magic missile spell, a line spell, or a spell that requires a ranged attack roll, roll a d6. On a 6, you are unaffected by the spell, and the effect is reflected back at the caster as though it originated from you, turning the caster into the target.

Plate consists of shaped, interlocking metal plates to cover the entire body. A suit of plate includes gauntlets, heavy leather boots, a visored helmet, and thick layers of padding underneath the armor. Buckles and straps distribute the weight over the body.

The wearer has disadvantage on Stealth (Dexterity) checks.

If the wearer has a Strength score lower than 15, their speed is reduced by 10 feet.

Proficiency: heavy armor Source: The Griffon's Saddlebag: Book Two p. 174 (Third Party)