Power of the Lich

You have developed traits similar to those possessed by a lich, granting you the following benefits:

• Increase your Constitution or Intelligence by 1, to a maximum of 20.
• You gain proficiency in Constitution saving throws.
• You gain proficiency in Arcana. If you are already proficient in Arcana you gain expertise in it instead.
• You gain resistance to poison damage.
• You have advantage on saving throws against exhaustion and the poisoned condition.
• If a creature ends its turn within 10 feet of you, you can use your reaction to force the creature to make a Wisdom saving throw (DC 8 + your proficiency bonus + your Charisma modifier). On a failed save, the target is frightened of you for 1 minute. The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to this effect for the next 24 hours.
• As an action, you can make a melee spell attack against a creature within your reach, using your Intelligence modifier for the attack roll. On a hit, the target takes 2d6 cold damage and must make a Constitution saving throw (DC 8 + your proficiency bonus + your Constitution modifier). On a failed save, the target is paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.
• As an action, you can force each non-undead creature within 20 feet of you to make a Constitution saving throw (DC 8 + your proficiency bonus + your Intelligence modifier). On a failed save, a creature takes 4d6 necrotic damage, or half as much on a successful one. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.