Arcain Shield Master

To use this feat you must have an intelligence of 13+ and you can now use shields for offence. You gain the following benefits while you are wielding a shield:

• If you take your action to defend on your turn, you place a shield in front of you that emits a magical aura and everyone including you with in 15 feet of you gain a +4 to there AC and resistance to magical and range attacks.
• Each Turn to keep this up you must use your action to Defend. If you attack with more than a cantrip or you move more than 5 feet the effect is broken and if a ally moves out of range they are no longer affected by this effect. 
• You can choose for this to only affect yourself, and in doing so your AC gain a +4 and resistance to melee attacks, advantage against magical effects and lasts for 4 rounds.
• If a creature attacks you with a melee weapon or natural weapons they must make a wisdom saving throw. On a failed saving throw they take 2D6 physic damage and have disadvantage on there next saving throws and on a successful save they take half damage.