The Hidden Truth

Player > Weapon > Melee > Shrieking knife, infrasonic

Shrieking knife, infrasonic

Starfinder Armory p.51

Level: 14
Price: 77400
Damage: 4d4 So
Bulk: L
Special: Operative, powered (capacity 20, usage 4)

A shrieking knife remains silent until it strikes a target, only then emitting a shrill burst of lethal frequencies. Harmonic models use focused sound arrays that are similar in their output, while interference versions combine sounds to increased effects. Infrasonic and ultrasonic models are like the interference version, but they also use sound waves outside the normal hearing spectrum.

One-handed WeaponsTypeLevelPriceDamageCriticalBulkSpecialSource
Shrieking knife, harmonicAdvanced421801d4 SoLOperative, powered (capacity 20, usage 2)ARM p.51
Shrieking knife, interferenceAdvanced9137002d4 SoLOperative, powered (capacity 20, usage 2)ARM p.51
Shrieking knife, infrasonicAdvanced14774004d4 SoLOperative, powered (capacity 20, usage 4)ARM p.51
Shrieking knife, ultrasonicAdvanced172590007d4 SoLOperative, powered (capacity 20, usage 4)ARM p.51


An operative can use the trick attack class feature (see page 93) with a weapon that has this special property. Any character can add her Dexterity modifier rather than her Strength modifier on melee attack rolls with weapons with this special property.


A melee weapon with an internal battery that must be charged to function has the powered special property, which lists its capacity and usage. Unlike with a ranged weapon, the usage is for 1 minute of operation rather than per attack, though using a powered weapon for less than 1 full minute still expends 1 full usage. The number of charges expended is equal to the usage × the number of minutes the weapon is used, rounded up to the nearest minute. You can activate the power of the weapon as part of the action used to make an attack with it, and it automatically deactivates after 1 minute.
As with ranged weapons, you can recharge the battery of a powered melee weapon using a generator or a recharging station, or you can purchase new batteries for it. If you try to attack with a powered weapon that’s out of charges, it functions as an improvised weapon (see page 169).

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