Dear Crows, let me give you a quick overview on the Shadow Domain of Crowfall and which Major and Minor Disciplines they give you access to. If you want to check out what each Specialization Class brings to the table check out my Races and Classes Guide.
CREDIT: I want to thank Tinnis, who made an invaluable contribution by providing the descriptions of the disciplines I could copy paste as captions to you can search the disciplines and their abilities.
SHADOW DOMAIN DISCIPLINES
Agent Provocateur • caltrops (stealth: target area snare: pierce debuff)• lay low (stealth: heal over time) 
Black Mask • study target (passive: damage bonus increased during stealth) 
Gapfinder between the seams (buff: increase group piercing penetration)pin cushion (barrier negates piercing damage) 
Master Of Darkness • stink bomb (stealth: target area stun; moderate corruption)• preparation (passive: generate pips while stealthed) 
Reality Tripper • alter reality (attack: absorb enemy healing)• last restort (passive: gain crit chance on low health) 
Scrapper • in the fray (buff: increases yout attack power lifesteal)• death throws (passive: area knockdown on retaliation) 
Waylayer • cheap shot (attack: stuns enemy ignoring resolve)• study target (passive: damage bonus increased during stealth) 
Shadowmaster • ambush (attack)• shadows linger (passive: increase critical damage amount after losing stealth) 
Critical Dodge • critical dodge (passive: critical strikes restore dodge) 
Glass Cannon • glass cannon (passive: increase damage; increase damge taken) 
Marked For Death • marked for death (mark a target to take increased damage from your group members) 
Payback • payback (passive: gain crit following retaliation) 
Reactionary • deadly retaliation (retaliate with high crit chance) 
Shadows Linger • shadows linger (passive: incerase critical damage amount after losing stealth) 
Weapon Finesse • weapon finesse (passsive: greatly reduces power resource costs)