Shadow Snap [two-actions] Focus 1

With a snap of your fingers, you beckon the target's shadow to obey you. When you Cast this Spell and the first time you Sustain it each turn on subsequent rounds, you can choose to either attack or stalk the target with its shadow. If you choose 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 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 until the end of your next turn; dealing 1d10 cold damage on a hit. If the attack is a critical hit, the shadow disrupts that action.