With a penchant for blood and gore so strong that it can even make the most ruthless barbarians retch, those who enter a pact with the Grim Grotesque use the scarring and manipulation of the body as a weapon and method of torture. These individuals are in a parasitic or symbiotic relationship with their patron. Their intentions vary, but most only wish to survive and create more of their kind. Their warlocks are often covered in chemical burns, large goiters, and other scars that they hide from the public. Beings that are capable of granting this power to warlocks include Dwiergus, Lord of Fleshforges, and Neth, the Plane that Lives.

The Grim Grotesque lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Starting at 1st level, the connection you share with your patron allows you to better scar your foes. Whenever you cast a spell that deals acid or necrotic damage, you add your Charisma modifier to that damage and you have resistance to acid and necrotic damage. Additionally, you know the acid splash and primal savagery cantrips. They count as warlock cantrips for you, but don't count against your number of cantrips known.

Vile Transmigration

Beginning at 6th level, you have become familiar with your own form and can warp corpses to mimic it. When a humanoid creature of your size or larger within 30 feet of you is reduced to 0 hit points, you can use your reaction to force the creature's body, or a portion of its body if the creature is larger, to start to morph into a new body that is identical to yours. During this transformation, everything the creature was wearing falls to the ground, unaffected by this feature. The transformation completes at the start of your next turn.

After the transformation is complete, you can use an action to cause your body to melt into a puddle of dissolved, viscous gore and transfer your soul into the new body if you are within 30 feet of it. When you do this, all equipment you are wearing or carrying fades away and immediately reappears on the new body and your current hit points are unaffected. If you do not transfer your soul into this new body within 1 minute of it forming, it turns to ash. Once you use this feature, you can't use it again until you finish a short or long rest.