From Unofficial Handbook of the Virtue Universe
An Abomination is a broad term that covers creatures with a spark of divine energy in them that nonetheless are bound to this world. Abominations range in their origins and their powers, but they all share a fundamental deific nature. Studied at length by the ancient Greek scholar Andikonus, he numbered a variety of types of Abominations, both under the Greek and Roman Pantheon, and other pantheons spread about the world.
Abominations share very few traits. The world has many ways for a divine influence to interface, which means there can be as many types of Abomination. The main elements shared by Abominations are as follows:
Abominations do not die of old age. Stories are told of some who willingly attempt to kill themselves, who take on mortal traits and let themselves die. Most stories then relate the Abominations have been reborn, sometimes with a new personality or a new set of ideals. This uncertainty has proven hard to study.
Abominations were in some way, created to a purpose that they cannot fulfil. Because of this and because of their immortal nature, many Abominations seek a way to destroy the world, that they can remake it in their own image, a world where they feel whole.
Unlike real divine creatures, Abominations do not require actual worship. They are as powerful as they will be regardless of the influence of mortal worship. In a more religious age, Abominations could recognise the power of the gods as often greater than their own - for this reason, Abominations are often resentful or cautious around people of strong personal faith.
Some known types of Abomination are as follows:
Anaxims are the creations of gods of the forge, but rather than being completed, they were discarded during the creation process. Anaxims are often driven to collect discarded creations, and rail against creative individuals. Anaxims are prone to destroying things that are wanted, to relate to their own intense rage at being unwanted.
Still-born godlings, Atropals are the results of deific creation that failed. Imbued with power, they rise as undead, typically hungering to destroy life. Most Atropals are imprisoned very quickly by wiser and stronger creatures while they are yet weak.
The contractual offspring of Nidhogg, eldest of dragons who dwells in the darkness beneath the world. The Dragesdatter was the result of a deceptively worded contract between that primordial entity and a powerful sorceror. A unique being created one day slay and replace her "father", her full purpose will not be revealed until the end of days. Filled with a violent temper and prone to seek out conflict and destruction, she currently spends her time attempting to channel her destructive urges into virtuous pursuits.
Created by the Titans, the Hecatoncheires were three Abominations who were crafted to keep the Greek pantheon in line. They were turned against their creators, and joined with Zeus in slaying the Titans. Even by the standards of Abominations, Hecatoncheires are rare, being unique, created individuals.
Massive living glaciers, Xixecals are amongst the oldest abominations, created when gods tried to claim winter was their own. Powerful cold forces, Xixecals are followed by powerful storms and creatures of cold, creatures that know not worship but do understand the power of nature in action.
Meta: The information for these Abominations derives from the 3rd Edition Dungeons and Dragons Epic Level Handbook. A wonderful source of inspiration, most of the above summarised types of Abominations are from the book