Curse

This spell has 2 different effects depending on the attributes of the user.

If the user is an Undead or any creature that is cursed, the spell has the following effect:

You use the dark energy inside you to curse your target. Upon casting this spell, you immediately take damage equal to half your max HP. If this causes you to hit 0 HP, the spell till takes effect. Choose a creature you can see within range. The creature must make a Constitution saving throw. On a failed save, the creature takes an amount of damage equal to 1/4th of their max HP. The target continues to take this damage at the start of each of their turns, and they can repeat the saving throw at the end of their turns. While under the effect of this spell, the target is considered cursed. The effect ends if the target hits 0 HP or if the curse is lifted by a successful saving throw or other means.

If the user is neither Undead nor cursed, the spell has the following effect:

You call upon dark energies to bolster your necrotic abilities. For 1 minute, you gain immunity to necrotic damage and resistance to radiant damage. Also, you can re-roll all 1s when rolling damage dice if the damage type is necrotic. This does not require concentration.