Incarnation
Incarnation literally means embodied in flesh or taking on flesh. It refers to the conception and birth of a sentient creature which is the material manifestation of an force, entity, god or concept whose original nature is immaterial.
The creature type first appeared in Judgement Each of these uncommon creatures had a common keyword ability, and gives creatures you control that ability as long as the it is in your graveyard and you control a land of the appropriate type: Valor, Wonder, Filth, Anger, and Brawn. Genesis and Glory are incarnations with similar abilities, but are not part of the cycle.
Inspired by the original cycle, Lorwyn had a cycle of rare Elemental Incarnations costing CCC. Each grants a powerful boon to its controller, and is shuffled back into its owner's library if put into its owner's graveyard from anywhere — Purity, Guile, Dread, Hostility, and Vigor.
Personal Incarnation from Alpha gained the subtype Incarnation retroactively.