6th-level Spell: Sanguine Doom

Sorcery/Whispering (Necromancy)

You target a point within range. Darkness washes over in a 30-foot radius area extinguishing all lights (including lights caused by supernatural effects of a lower level spell) as blood rains down from above over the area. Creatures and objects that are not being worn or carried within the area take 4d6 acid damage, and creatures must make a Wisdom saving throw against being cursed with doom.
On a failure, the creature gains the doomed curse, and the next time they are hit with an attack roll, that attack becomes a critical hit. On a success, they suffer no further effect.
Source: KCC

• Casting Time: 1 action
• Range: 120 feet
• Components: S, M (a splash of your blood worth at least 6 hit points, which the spell consumes)
• Duration: Instantaneous
• Ritual: No