Head

A Head is a creature class representing a head of a creature acting independently. It was introduced first in a Challenge Deck for a Hydra which has many heads and later also became an acorn type for a Zombie which can live as a head.
==History==
Heads were first referred to in the rules text of from Alpha as named counters.
Heads reappeared as a creature type in the Face the Hydra Challenge Deck from the Theros block. Here they were always combined with the creature type Hydra (<c>Hydra Head</c>), and sometimes with the supertype Elite. All cards in the Hydra Deck, including Heads on the battlefield, are colorless and have a converted mana cost of 0. Players can't gain control of any Heads. If a Head would go to any zone other than the Hydra's graveyard, it's put into the Hydra's graveyard instead.
Head finally appeared in the silver-bordered Unstable set, on the card <c>Skull Saucer</c> which was a Zombie Head.