Lay Low [Rogue Ability se108]

[Shadow Era]

Credit goes to Caelifer (card) / Ross (flavor)

[Montag451]

Name: From the Dark
Casting Cost: 3
Effect: Ongoing: Target ally cannot be attacked.
Flavor Text: "When done right, your opponents will think you a ghost."

edit: Changed mine. One of the other cards had many similar suggestions and it works better with that one than this, so I changed my suggestion for this one.

[paulishuku]

Stealth of Shadows
4
Ongoing, if you have no allies in play only allies with casting cost 4 or higher can attack you.
"I feel safest in the shadows."

[yaemon]

Name: Perfect Strategy
Casting Cost: 2
Effect: Draw 3 cards, discard 2 from your hand.
Flavor Text: "Every fortress can be assaulted."


Some drawing utility for rogues.

[AnAdolt]

Name: Stratagem
Card Type: Rogue Ability
Casting Cost: 1
Effect: Target ally gains Escape Decoy until your next turn. Last Resort—gain Escape Decoy permanently instead.
Flavour Text: Let shadow be your home. Until opportunity knocks on your door.

From the art, the rogue is on the outskirts of town and from the lights that can be seen, there seems to be a search party; one that perhaps she escaped from. To clarify, this is a one-time use card and will temporarily or permanently add Escape Decoy to an ally's description. For more info on how Escape Decoy and Last Resort works, please visit their mechanics page.

[Laura]

Name: Covert Ops
Casting Cost: 3
Effect: Remove target ally you control from the play to your hand; destroy random item your opponent controls.
Flavor Text: "Stay hidden until you find a good spot to sabotage."

[Ringel]

Name: Secret Paths
Casting: 4
Rogue Item
Effect: Your hero has Ambush (Hero's attacks cannot be counter-attacked)
Flavor Text: "Walls do not provide safety, only complacency."

[Martin JF]

Name: Observation
Cost: 2
Target ally is exhausted for 2 rounds, but has +3 attack
Flavor: Observe your target

[Reshiram99]

Name: Stealth Assault
Casting Cost: 3
Effect: All enemy allies cannot defend this turn.
Flavor Text: "All the better if they don't see you."

[NeVeRxDiE]

Name : Out of The Darkness
Cost : 4
Effect : Destroy target enemy 4 cost or less
Flavor : "Like a thief in the night"