The year is 2004, the location is Fuyuki City. At first glance this simply looks like a normal town but see it from a point of a Magus and you will notice something strange here, a Grail War. Taking place in Fuyuki city is the 5th Holy Grail War. Here seven magus are chosen to participate in the Holy Grail War. These Magus are called Masters who can summon a Heroic Spirit to fight side by side with them. These Heroic spirits are called servants and are famous heroes, like King Arthur, Vlad, Achilles, Alexander the Great, Jack the Ripper and etc. Servants posses supernatural powers and some are capable of wiping out entire armies single handily. A master and his servant will work together to try and defeat the other servants and masters in order to get the Holy Grail. To make sure that the servant works with his Master, the Master is given three command seals, that can force the servant to do something against his will but this order must be specific, the more vague it is, the less power the order will have. The Holy Grail is a powerful device able to grant a person wish, hence why magus are willing to put their lives on the line.
Information on Servants: http://typemoon.wikia.com/wiki/Servant
Information about Masters: http://typemoon.wikia.com/wiki/Master
Information on Command seals: http://typemoon.wikia.com/wiki/Command_Spells
Spots:
Saber: Open / Master: Open
Lancer: Open / Master: Open
Archer: Open / Master: Open
Berserker: Arcueid / Master: Open
Rider: Open / Master: Open
Caster: King Solomon / Master: Open
Assassin: Open / Master: Open
Avenger: Open but not required / Master: Only available if there is an Avenger
Ruler: Jeanne of Arc
Left Over Servant From Previous War: Open but not required / Master: Only available if there is a left over servant
Shielder: Open but not required. Please PM if your interested in this class / Master: Only available if there is a Shielder
Extra Servant: Pestilence / Master: Closed
I prefer canon characters over original created characters. That is not to say you cannot make originally created characters but I will want an explanation on why their stats are like that, how their skills and noble phantasm relates to their legend.