Murder Domain

Clerics who follow the domain of murder worship evil gods obsessed with sacrifice, killing and blood. For them their worship is a means to meet other likeminded people and revel in murder, while the murder brings power to the god through their sacrifice. However, having followers consisting of mostly psychopaths requires that these gods hold a tight leash around their disciples, save for their murder to lose meaning. Disciples might follow a dogma of strength above all and see murder as a means to cull the weak and in evil cults that these clerics might gather, it is common place for twins born under the light of the murder domain to fight to the death to leave the strongest. 

Murder Domain Spells

Murder Domain Spells
Cleric Level	Spells
1st	Hex, Inflict Wounds
3rd	Cloud Of Daggers, Spiritual Weapon
5th	Slow, Crusader's Mantle
7th	Phantasmal Killer, Vitriolic Sphere
9th	Steel Wind Strike, Enervation

Instruments of Murder

At 1st level you gain proficiency with three weapons of your choice. You may use those weapons as a spell casting focus. In addition while you are dual wielding weapons and you cast a cleric spell of 1st level or higher that uses an attack roll, you may make an offhand attack as a bonus action. 

Disciple of Murder

Also starting at 1st level, you're more ready to hurt than other clerics. Whenever you use a spell of 1st level or higher to deal damage, targeted creatures lose additional HP equal to the spell’s level.

Channel Divinity: Start The Hunt

Starting at 2nd level, you can use your Channel Divinity to weaken creatures you intend to kill, never too much to ruin the fun. 

As an action, you present your holy symbol and evoke destructive energy. That can cause creatures to lose a number of hit points equal to 5 + five times your cleric level. Choose any creatures within 30 feet of you, and divide the damage among them. This feature can reduce a creature to less than half of its hit point maximum, excess damage can be transferred to another creature if you underestimate a creatures health. You can’t use this feature on an undead or a construct.

Wretched Killer

Beginning at 6th level, The thrill of murder grants you a burst of speed. When you reduce a creature to 0 hit points, you gain 5 temporary hit points, and can immediately move up to 10f to make a melee weapon attack against a creature within range as a reaction. 

Divine Strike

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

A Beautiful Death

You add the spell Power Word: Kill to your domain spells. Once per long rest, you can cast it for free, when you cast it in this way, it reduces a creature with up to 150 health down to 1 health, and they become marked, you always know the target's location, as long as the two of you are on the same plane of existence. While you have this knowledge, the target can’t become hidden from you, and if it’s invisible, it gains no benefit from that condition against you. This effect lasts until you reduce the creature to 0 hit points. When you do so, your next divine intervention gains a +15 to the chance to succeed or you can reduce the cooldown by 2 days, this is as long as your deity determines the death worthy.