Shadow Snap [two-actions] Focus 1

With a snap of your fingers, you command the target's shadow to either attack or stalk its body. If you command it to attack, attempt a spell attack roll against the target's AC, dealing 1d10 cold damage on a hit (or double damage on a critical hit). This attack uses and contributes to your multiple attack penalty.

If you command the shadow to stalk, attempt a spell attack roll against the target's AC the first time the target uses a manipulate action or a move action, makes a ranged attack, or leaves a square during a move action it's using; dealing 1d10 cold damage on a hit. If the attack is a critical hit, the shadow disrupts that action.

Each time you Sustain the spell, you can choose to either attack the target or command the shadow to stalk the target until the end of your next turn.