Units you draw get Killer.
Card sounds may differ from in-game as they get updated.
Killer - A unit with Killer can make one special attack directly against an enemy unit. This can be done the turn it's played, and can target any unit, regardless of Flying, Aegis, or other special abilities.
Reckless - Units with Reckless must attack.
Inspire - Units with Inspire grant a bonus to other units you draw.