Gadrie's direct contact with Chaos has been minimal, only followers of Tzeentch and a minor Lord of Change, which was fearsome enough. He'd seen an astropath possessed by Imurah, and the havoc that it wrought.

"Any doorway into the warp is a temptation for Chaos to step through." Anything unnatural or 'magic' is suspect. Especially since Gadriel had been fooled before.

Gadriel shrugs. The robotic hand does not bother him. His own squadmade Chairon has an entire arm augment and his captain has an optical replacement. "That merely states that you have lost your hand in battle with the enemy." Because that's the only way he knows that people get wounded.