Vampire Intelligence

The Vampire Intelligence are an evil Lovecraftian-like inter-dimensional race of conquerors in the Palladium Rifts Megaverse roleplaying universe. Beings whom are malevolent and sadistic.

Biology
Vampire Intelligences have a horrifying Lovecraftian form. It's a slime covered lump of flesh that's up to two dozen ft tall, with a huge cyclopean eye surrounded by a 100 small eyes. The being has a diameter of up to 200 ft, with up to dozen tentacles with fanged mouths that can stretch up to 200 ft. The creature feeds on the magical energy of a world, and enjoys feeding on humanoid blood.

Powers
The race has a wide variety of powers and abilities. Super strength and incredible regeneration, being able to survive a direct hit by a nuke in the 100s kiloton range (though it would be seriously wounded). It is a very powerful psionic and is able to use magic. The Vampire Intelligences are able to send fragments of their lifeforce into other dimensions where they bond with willing hosts and is in communication with those hosts. It does have the weakness of being vulnerable to holy water, weapons of silver or wood, and running water all of which inflict far more damaged to a Vampire Intelligence than explosives, energy cannons, or projectile firing guns.

Once in a host the lifeforce shard can fragment further into 1000s of tiny shards, used to create vampires. Upon creating a few thousand vampires, it can physically enter and inhabit that dimension. It will seize control of a nexus of magic (ley lines) to maintain its physical presence in that world, and will build a fortress at that location and prevent its use by other magical users or interdimensional travelers. While in that dimension it is linked to all the vampires created by its lifeforce within several miles of the citadel.