Excal-heim
Magic Resistance. Mage Slayer has advantage on saving throws against spells and other magical effects. Drops Guardian Tower Shield and Chain Sword
Chain Sword. Melee Weapon Attack: +9 to hit, reach 5 ft, one target. Hit: 2d10 slashing damage / Versatile 2d12 slashing damage. Shield wall. As an action, deploy the shield. While deployed, the mage slayer gains three-quarters cover but the mage slayer's movement drops to 0. Force Shield wall. (recharge 2-3) As an action, expand a translucent light-blue wall of force from the sides of the shield giving full cover but the mage slayer's movement drops to 0.
Shield Parry. As a reaction, add +1 AC for an incoming attack that it can see.