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PFS StandardMalicious ShadowFocus 3

Source Advanced Player's Guide pg. 238
PFS Note Strikes made by a malicious shadow use the spellcaster’s spell attack roll.

Lesson lesson of shadow
Cast Two ActionsTwo Actions somatic, verbal
Range 30 feet; Targets 1 creature
Duration sustained up to 1 minute
You reshape the target's shadow into a deadly form, such as strangling hands, a dangerous weapon, harrying runes, or the like, and command it to attack the target. When you Cast the Spell, and each time you Sustain the Spell, the shadow makes a Strike against the target. The shadow moves along with the foe, always remaining within reach. If you Sustain the Spell multiple times in a round, you gain this effect each time. The shadow uses and contributes to your multiple attack penalty.

The shadow's Strikes are melee spell attacks. Regardless of its shape, the shadow's Strikes deal damage equal to 1d10 plus your spellcasting ability modifier. You choose the type of damage when you Cast the Spell, choosing from bludgeoning, piercing, or slashing damage. The shadow doesn't take up space, grant flanking, or have any other attributes a creature would. The shadow can't make any attacks other than its Strike.

The shadow vanishes if the target moves into an area of complete darkness or enters an area with light from all directions such that the target doesn't cast a shadow. If another effect is controlling the target's shadow when you cast malicious shadow, you can attempt to counteract that effect to temporarily take control of the shadow, but the original effect resumes when malicious shadow ends.
Heightened (+2) The Strike damage increases by 1d10.