Calamity Mod Wiki
Cosmic Kunai
  • Cosmic Kunai.png
Stack digit 1.png
TypeWeaponCrafting material
Damage92 Rogue
Knockback5 (Average)
Critical chance4%
Use time9 Very Fast
TooltipFires a stream of short-range kunai
Stealth strikes spawn 5 Cosmic Scythes which home and explode
Inflicts DebuffGod Slayer InfernoGod Slayer Inferno
100% chance

Debuff duration1 second (Cosmic Scythe)
Debuff tooltipYour flesh is burning off
RarityRarity Level: 12
Sell 24 Gold Coin.png
Projectile created
Cosmic Scythe
Cosmic Scythe
Dropped by
Signus, Envoy of the Devourer133.33%

The Cosmic Kunai in use.

The Cosmic Kunai is a post-Moon Lord dagger dropped by Signus, Envoy of the Devourer. It rapidly fires a stream of quick-moving, short-range kunai that pass through tiles and are not affected by gravity. The kunai turn transparent as they travel; however, this does not affect their damage and is only an aesthetic addition. The kunai also very slightly curves toward nearby enemies.

Performing a stealth strike with the Cosmic Kunai will deal 321% damage and cause five Cosmic ScytheCosmic Scythes to release around the player alongside the kunai. The scythes will each deal 256.8% damage, linger if no enemies are nearby, sharply home onto enemies, and erupt into an explosion that inflicts the God Slayer Inferno debuff.

Its best modifier is Flawless.


Used in[]

ResultIngredientsCrafting station
Time BoltTime BoltAncient ManipulatorAncient Manipulator
total: 1 row(s)


  • The Cosmic Kunai's incredibly high single-target damage has limited usefulness against fast bosses like Storm Weaver and The Devourer of Gods; conversely, the Cosmic Kunai is quite effective versus Blood Moons and other buffed Calamity events due to its strong single-target damage.


  • In the real world, a kunai is a 14th century Japanese farming tool. Since then, the knife-like shape of the kunai has led to its common depiction as a weapon used by ninjas and assassins.
  • This weapon functions very similarly to the Mycoroot.