Aureal Guardian

Shield Master. The Aureal Guardian adds the AC of their shield to any Dexterity saving throw made against a magical effect they can see.

Ranged Defense. Any ranged attack made against the Aureal Guardian is done with disadvantage due to their shield.

Damage Reflection. Whenever the Aureal Guardian takes bludgeoning, piercing, or slashing damage in melee, the attacker suffers half that damage back. 

Life Link. The Aureal Guardian shares its hit-point pool with its summoner. If ever their summoner's hit-points reach 0, the Aureal Champion transfers their hit-points to ensure they have at least 1.

Multiattack. The Aureal Guardian makes two weapon attack with whichever weapon she possesses.

Longsword. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 target. Hit: 12 (1d8 + 7) [slashing] damage + (1d8) [fire] damage.

Mace. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 target. Hit: 13 (1d8 + 7) [bludgeoning] damage + (1d8) [radiant] damage.

Hunker Stance. As a bonus action, the Aureal Guardian can enter a Hunker Stance taking half damage from all attacks made against them. However, while Hunker Stance is active their movement speed is halved and they make their attack rolls with disadvantage. The Aureal Guardian can enter and exit Hunker Stance as a bonus action on their turns.

Protection. Whenever a hostile creature attacks a friendly creature within 5-feet of the Aureal Guardian , she can use her reaction to impose disadvantage on the attack roll.

 Interpose Positioning. The Aureal Guardian and choose to switch places with their summoner as a reaction so long as they are no more than 90-feet apart.