Destruction Domain

Destruction. It has no alignment. It does not choose who or what it destroys, but those who control it can. It can be used those of good and just intentions to stop those of great evil, but those of that great evil can use it to slaughter people and level cities. Certain gods bask in either of these situations, such as those of destruction and pillage (such as Erythnul, Ares, Sargonnas, the Fury, and Gruumsh) and those of protection and guardians (such as Bahamut, Aureon, Paladine, and Trithereon). No matter their gods, clerics if destruction can all move mountains and kill hordes.

Destructive Defense

 When a creature within 5 feet of you hits you with a melee attack, you can use your reaction to cause creatures within 5 feet of you to make a Constitution saving throw. On a failure, the targets take 2d6 force damage, or half as much on a success. You can do this a number of times equal to your proficiency modifier.

Reverse Mending

When you choose this domain at 1st level, you gain the Mending cantrip. You also have the ability to, when you cast it, do the inverse of that the spell entails.

Channel Divinity: Wrath of The Destroyer

Starting at 2nd level, you can use your Channel Divinity to deal devastating damage to enemies.

When you cast a spell, you can cause that spell to deal maximum damage.

Channel Divinity: Forced Undoing

Beginning at 6th level, you gain the ability to have your spells effect creatures more. As a bonus action, you can cause a creature within 60 feet of you to have disadvantage on their next saving throw.

Potent Spellcasting

Starting at 8th level, you add your Wisdom modifier to the damage you deal with any cleric cantrip.

Destruction Demigod

Starting at 17th level, when you cast a spell of 1st through 4th level that targets 1 creature, you can instead target 2 creatures given that they are within 5 feet of each other and both in range of the spell cast.