From WoWWiki

Cryptstalker Armor is a nine piece epic quality Tier 3 Hunter set. It is obtained by collecting specific BoP epic drops along with rare scraps from inside Naxxramas and materials from various professions in order to complete specific quests given by Huntsman Leopold in Light's Hope Chapel, Eastern Plaguelands; which begins with Echoes of War.

Cryptstalker Armor Set Items
Item	Level	BoP	Quest Item (BoP)	Naxxramas
[Cryptstalker Headpiece]	60	X	[Desecrated Headpiece]	Abomination wing: Thaddius
[Cryptstalker Spaulders]	60	X	[Desecrated Spaulders]	Abomination wing: Gluth Abomination wing: Grobbulus Abomination wing: Patchwerk
[Cryptstalker Tunic]	60	X	[Desecrated Tunic]	Deathknight wing: The Four Horsemen
[Cryptstalker Wristguards]	60	X	[Desecrated Wristguards]	Abomination wing: Gluth Spider wing: Anub'Rekhan Spider wing: Grand Widow Faerlina
[Cryptstalker Handguards]	60	X	[Desecrated Handguards]	Spider wing: Maexxna
[Cryptstalker Girdle]	60	X	[Desecrated Girdle]	Abomination wing: Gluth Plague wing: Heigan the Unclean Plague wing: Noth the Plaguebringer
[Cryptstalker Legguards]	60	X	[Desecrated Legguards]	Plague wing: Loatheb
[Cryptstalker Boots]	60	X	[Desecrated Boots]	Abomination wing: Gluth Deathknight wing: Gothik the Harvester Deathknight wing: Instructor Razuvious
[Ring of the Cryptstalker]	60	X	-	Frostwyrm Lair: Kel'Thuzad
Number of set items equipped for bonus:
2: Increases the duration of your Rapid Fire by 4 secs. 4: Increases Attack Power by 50 for both you and your pet. 6: Your ranged critical hits cause an Adrenaline Rush, granting you 50 mana. 8: Reduces the mana cost of your Multi-Shot and Aimed Shot by 20.

Cryptstalker Armor Set Quests
Quest	Naxxramas Items		Profession Items
	Quest Item (BoP)	[Wartorn Chain Scrap]	[Nexus Crystal]	[Arcanite Bar]	[Cured Rugged Hide]
Cryptstalker Headpiece	[Desecrated Headpiece]	15	2	4
Cryptstalker Spaulders	[Desecrated Spaulders]	12		2	3
Cryptstalker Tunic	[Desecrated Tunic]	25		4	3
Cryptstalker Wristguards	[Desecrated Wristguards]	6		1	2
Cryptstalker Handguards	[Desecrated Handguards]	8		1	5
Cryptstalker Girdle	[Desecrated Girdle]	8	3	1
Cryptstalker Legguards	[Desecrated Legguards]	20		3	5
Cryptstalker Boots	[Desecrated Boots]	12	3	1
Total quest items:	8	106	8	18	18

Cryptstalker Armor Set Values
Stat	Headpiece	Spaulders	Tunic	Wristguards	Handguards	Girdle	Legguards	Boots	Ring	Total
Armor	513	464	658	276	395	355	552	425	-	3638
Durability	85	85	140	50	50	50	105	70	-	635
Agility	21	20	30	18	16	16	28	22	20	191
Intellect	12	10	15	-	15	12	10	8	-	82
Stamina	30	23	27	16	21	22	26	19	-	184
+Crit	28	14	14	-	14	14	14	-	-	98
+Hit	-	-	10	10	-	10	-	10	-	40
+Mana Regen	3	-	4	-	4	3	6	-	6	26
+AP	40	38	60	34	32	-	56	44	40	344

Notes

Added in Patch 1.11. This set is a significant advancement over anything else that was ever available to Hunters, including the Dragonstalker Armor and Striker's Garb. It offers a great deal of mana regeneration, a new bonus to hunters, which should be useful in any long battles the hunter may face.

"The preternatural ability of the crypt fiend to hunt and kill its foe is one studied and vaunted by men in my profession. I, myself, have slain thousands of the beasts in my crusade to rid this world of Scourge.

While I loath the crypt fiend for its merciless nature, its abilities must be admired. It has a job and it does it - very well.

I have discovered a use for the carapace of the crypt fiend and its various body parts. I am able to fashion an extremely light and very deadly set of armor by combining the fragments with some of the desecrated magical armors lost in Naxxramas."

~ Huntsman Leopold, Light's Hope Chapel, Eastern Plaguelands.

External links

Wowhead
Thottbot
Allakhazam

Hunter sets
Dungeon		1: Beaststalker Armor • 2: Beastmaster Armor 3a: Beast Lord Armor • 3b: Desolation Battlegear
Reputation		ZG: Predator's Armor • AQ20: Trappings of the Unseen Path • AQ40: Striker's Garb • Stalker's Chain Battlegear
Tier (Raid)	1/2/3	Giantstalker Armor • Dragonstalker Armor • Cryptstalker Armor
	4/5/6	Demon Stalker Armor • Rift Stalker Armor • Gronnstalker's Armor
PvP-	AB	The Highlander's Determination • The Defiler's Determination • The Defiler's Fortitude
	Rare	Lieutenant Commander's Pursuance • Champion's Pursuance
	Epic	Field Marshal's Pursuit • Warlord's Pursuit
Arena		1: Gladiator's Pursuit • 2: Merciless Gladiator's Pursuit • 3: Vengeful Gladiator's Pursuit • 4: Brutal Gladiator's Pursuit