Darkness weaver

Your god has given to harness the power of darkness and turn it against your enemies. You gain a resistance to necrotic damage. Twice per long rest when you take necrotic damage you can choose to use the power of the shadows to activate one of the following abilities:

• Add 1d6 to your AC till the end of your next turn.
• Add 1d6 to your hit points or the hit points of an ally within 60ft of you.
• Add 1d6 to the damage of your next successful attack.
• Use the necrotic power to cast a wave of dark energy and force every character within 15ft to make a constitution saving throw DC (8+your paladin level).
• Use the necrotic power to cast a shield made of shadows to defend one of your allies that increases their ac by 1d4. However it also lowers your AC by the same number.