Noble Phantasms

Spoilers Ahead

Noble Phantasms are the major trump cards of every single servant. Each Noble Phantasm is unique to each servant and is usually an ability that has some key relation to the servant's true identity and past. With the exception of faction servants, all Noble Phantasms require the usage of either a 3rd level spell slot or a Command Seal. After the usage of a Noble Phantasm, there is usually a pretty significant wait time before it can be used again. Most summoners and servants will save their Noble Phantasm until they are fighting a seriously major threat.

Types of Noble Phantasms

Noble Phantasms come in many types and forms. The more iconic Noble Phantasms come in the form of ultra-powerful attacks, strikes, or blasts that are done via a servant's main weapon or magic focus. An alternate type of Noble Phantasm is used in a more utilitarian way. These types of Noble Phantasms revolve around a servant's main weapon. In this case, the weapon itself is the Noble Phantasm. For these types, a spell slot or Command Seal used will simply enhance the strength of said weapon greatly for the duration. And other Noble Phantasms may be a combination of multiple factors. 
The following is a spreadsheet list of every known Noble Phantasm on Tynaria Alt. This list will update and continue to expand.