Summon Spirits (UW)

Summon Spirits are magical creatures that can be summoned, usually for battle purposes. These creatures are usually very powerful and can deal devastating attacks on their enemies, though there are some summons that use more curative abilities than others.

Nature of Summons
Unlike the conventional form of Summoning through various Charms, Summon Stones are absorbed into a person if that person allows the summon to do so. Once the Stone is absorbed by the person its spirit forms a symbiotic host, inhabiting the person's heart. Within the person, the summon can use his/her/it's strength to augment the host's power, either by increasing the user's physical attributes, magical attributes, special skills or a combination of the three up to and including all three. They can also give the host spells that they were not able to use without them, and over a long period of time through a bleeding effect that can let the host use these abilities without their summon, albeit weaker. These summons can also give the user an enhanced drive form if they use drives, further augmenting the user's abilities.

Summon's are also sentient. They are free thinking, using their experiences in life as well as with their previous hosts (if they had any prior to their current one) to advise the user. There are cases where the summon spirit can act independently with their host, in some cases even possessing their host to achieve their goals, whatever they might be.

It is believed that the various summon spirits are actually people who have done various deeds in the past, and as a result have had strong hearts (either of light or darkness). When they die, the spirit is absorbed into the heart, the result of it being the crystallization of the heart. Usually this is a result of events such as the destruction of the individual's (as is the case in Kingdom Hearts) but it is not usually the case.

In rare occasions, a person can be born with a summon spirit, in this case, Princess Fuu Chao Rin of Eastern Cloud was born with the Summon Spirit Pheonix. How this occurs is currently unknown and some researchers are looking into it, but nothing has been proven.

Trivia

 * The Idea of Summon Spirits was originally used by Tipsynaruto of Final Fantasy Forums. Their capabilities as well as the use of Summons in stone form are taken from the Final Fantasy series, namely Final Fantasy VIII, X and Dissidia.