Hassan-i-Sabbah

, also known as the , is the pseudonym shared by the nineteen leaders of the , a medieval Islamic sect based in . 
All nineteen leaders are currently Wraiths considered Heroic Spirit Candidates that have yet to properly ascend to the Throne of Heroes. When summoned as Servants, they are always the Assassin class, and sometimes the only possible candidates for the class entirely. The name of the sect is the etymological root of the word "assassin;" and the class name itself thus acts as the Catalyst to summon the members of the organization.
==Attributes==
The requirement for those who might truly be described as perfect assassins would normally be to remain anonymous and consequently fail to become Heroic Spirits, so only the Old Man of the Mountain who is known throughout history would normally be applicable for the Assassin class. They are normally summoned in place of truly anonymous killers, but others have managed to fit into the class as well. They have all lost their faces and names upon becoming wraiths, instead only having carved out faces hidden behind skull masks. If they were to regain them, they may be able to be properly inducted. Due to being selected from a group of Wraiths, their abilities are low. 
The greatest skill of each is expressed as their Noble Phantasm, all of which share the name Zabaniya, the name of the 19 angels that guard Hell and torment its inhabitants under , according to Islamic faith. The first Hassan-i-Sabbah has not displayed having a Noble Phantasm bearing the name Zabaniya, but instead is shown to possess Azrael, the Angel of Death that carries the souls of the deceased to their final destinations. 
At some point, between 1189-1192, one of the nineteen Hassan-i-Sabbah joined forces with Richard I and to fight together against a Dead Apostle during the .Fate/strange Fake Volume 2 - Chapter 3: Day 1, Early Dawn "Ensemble Versus Illusion"Fate/strange Fake Volume 3 - Chapter 8: Day 1, Afternoon (2) "The Wandering King's Rock'n'Roll"
==Known Hassan-i-Sabbah==
Number 	Name 	Era 	Zabaniya
1 	"Old Man of the Mountain" 	1090 - ???? 	None (Azrael)
Unknown to all Hassans 	Hassan of the Fathomless Rift 	Unknown to all Hassans	Meditative Sensitivity
? 	Hassan of the Cursed Arm 	???? - 1273 	Delusional Heartbeat
? 	Hassan-i-Sabbah (Third Holy Grail War) 	Unknown 	Cyber Phantasy
? 	Hassan-i-Sabbah (Fate/kaleid liner PRISMA☆ILLYA)	Unknown 	Dead Heartbeat Melody
? 	Hassan of Intoxicated Smoke 	Unknown 	Heretical Reminiscence
? (directly preceding Serenity)	Hassan of the Shining Star 	Unknown 	Thoughtless Framework
? 	Hassan of Serenity 	Unknown 	Delusional Poison Body
? 	Hassan of the Quaking Pipe 	Unknown 	Unknown
? 	Hassan of Shadow-Peeling 	Unknown 	Unknown
? 	Unknown 	Unknown 	Febrile Inspiration
? 	Unknown 	Unknown 	Ichor of Reverie
? 	Unknown 	Unknown 	Raving Shadow Flash
? 	Unknown 	Unknown 	Unfeeling Patrolling Spirits
N/A 	Hashshashin member (Failed aspirant) 	Unknown 	Unknown.
N/A 	No Name Assassin (#19 candidate) 	Unknown 	Phantasmal Pedigree
19 	Hassan of the Hundred Faces 	Unknown 	Delusional Illusion
==References==
vi:Hassan-i-Sabbah
Category:Servants
Category:Persian Servants
Category:Organizations
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Category:Anti-Heroes
Category:Terminology in Fate/stay night
Category:Terminology in Fate/Zero
Category:Terminology in Fate/strange Fake
Category:Terminology in Fate/kaleid liner PRISMA☆ILLYA
Category:Terminology in Fate/Grand Order
Category:Terminology in Fate/Prototype