Incarnations are a creature type often used for physical manifestations of abstract forces or concepts. Several famous Incarnations are valuable specifically while in the graveyard, encouraging decks to discard or mill them intentionally.
Wonder gives your creatures flying from the graveyard, Anger can grant haste, and Brawn provides trample. Larger Incarnations such as Endurance and Solitude instead function as powerful interactive creatures with evoke, while Glory has an activated mass protection ability that can only be used from the graveyard.