Void Barrier

You incant a short prayer for a protective ward. For the duration of the spell, you gain the following benefits:

• Advantage on your own area of effect spells and their effects.
• A fly speed equal to your walking speed and can hover.
• Your AC increases by an amount equal to half your spellcasting ability modifier, rounded down.
• Ranged attacks made against you have disadvantage.
• When you make a saving throw while this spell is active you can use your reaction to teleport up to your movement speed and gain advantage on the roll. If you succeed on the saving throw you take no damage from the triggering effect, if you fail you take half damage.
• When an enemy makes a melee attack against you, you can use your reaction to impose disadvantage on the attack and may teleport up to your movement speed. If the attack still hits, you instead take half damage.

You can use either of the above reaction effects a number of times equal to your spellcasting ability modifier.