The Death domain is concerned with the forces that cause death, as well as the negative energy that gives rise to undead creatures. Deities such as Chemosh, Myrkul, and Wee Jas are patrons of necromancers, death knights, liches, mummy lords, and vampires. Gods of the Death domain also embody murder (Anubis, Bhaal, and Pyremius), pain (Iuz or Loviatar), disease or poison (Incabulos, Talona, or Morgion), and the underworld (Hades and Hel).

Source: Dungeon Master's Guide

Death Domain Spells
Cleric Level Spells
1st False Life, Ray of Sickness
3rd Blindness/Deafness, Ray of Enfeeblement
5th Animate Dead, Vampiric Touch
7th Blight, Death Ward
9th Antilife Shell, Cloudkill

Bonus Proficiency

When you choose this domain at 1st level, you gain proficiency with martial weapons.

Reaper

At 1st level, you learn one necromancy cantrip of your choice from any spell list. When you cast a necromancy cantrip that normally targets only one creature, the spell can instead target two creatures within range and within 5 feet of each other.

Channel Divinity: Touch of Death

Starting at 2nd level, you can use Channel Divinity to destroy another creature's life force by touch. When you hit a creature with a melee attack, you can use Channel Divinity to deal extra necrotic damage to the target. The damage equals 5 + twice your cleric level.

Inescapable Destruction

Starting at 6th level, your ability to channel negative energy becomes more potent. Necrotic damage dealt by your cleric spells and Channel Divinity options ignores resistance to necrotic damage.

Divine Strike

At 8th level, you gain the ability to infuse your weapon strikes with necrotic energy. Once on each of your turns when you hit a creature with a weapon attack, you can cause the attack to deal an a 1d8 necrotic damage to the target. When you reach 14th level, the extra damage increases to 2d8.

Improved Reaper

Starting at 17th level, when you cast a necromancy spell of 1st through 5th level that targets only one creature, the spell can instead target two creatures within range and within 5 feet of each other. If the spell consumes its material components, you must provide them for each target.