Calamity Mod Wiki
Legendary Items.gif
Witness the horror!
Malice Mode-Only Content: This information applies only to Malice Mode and Malice Mode worlds.
  • Quasar.png
Stack digit 1.png
Damage80 Rogue
Knockback0 (No Knockback)
Critical chance16%
Use time11 Very Fast
Stealth strikes spawn more explosions
Inflicts DebuffAstral Infection (debuff)Astral Infection
100% chance

Debuff duration2 seconds (Explosion and Astral stars)
3 seconds (Knives)
Debuff tooltipYour flesh is melting off
RarityRarity Level: 9
Sell 19 Gold Coin.png
Projectiles created
Astral Star
Astral Star
Fallen Star (Calamity)
Fallen Star
Hallow Star
Hallowed Star
Dropped by
Astrum Deus1100%

The Quasar is a Hardmode non-consumable dagger that drops from Astrum Deus in Malice Mode. It functions identically to the Radiant Star with the main difference being that the explosion will pull in enemies. The black hole-like effect does not affect bosses. If an enemy is hit by a Quasar knife that is caught up in the explosion, astral, fallen, and hallowed stars will rain down on them, dealing full damage of the Quasar knife. Unlike the Radiant Star, the split knives of Quasar do not home in on enemies.

Performing a stealth strike with the Quasar will cause the split Quasar knives to emit explosions on contact that rain down astral, holy, and fallen stars as long as an enemy is within the explosion.

Its best modifier is Flawless.


  • This item is a reference to the item of the same name from Borderlands 2.
  • A quasar is an extremely bright astronomical object which consists of a supermassive black hole constantly sucking in gas from an accretion disk around it, generating massive amounts of energy in the process.
  • The tooltip is a reference to a meme where the word "suck" is purposely spelled as "succ".
  • The color palette of the weapon is a reference to the astral palette in previous versions of the mod.
  • It was formerly the rare variant of the Radiant Star.