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  • Mourningstar.png
Stack digit 1.png
TypeWeaponCrafting material
Damage112 Melee
Knockback2.5 (Very Weak)
Critical chance4%
Use time10 Fast
Velocity48 effective
TooltipLaunches two solar whip swords that explode on hit
Inflicts DebuffDaybrokenDaybroken
100% chance

Debuff duration3 seconds
Debuff tooltipIncinerated by solar rays
RarityRarity Level: 12
Sell 30 Gold Coin.png
Research1 required
Projectiles created
Mourningstar Flail
Solar Explosion
Solar Explosion
Not to be confused with Morning Star, a vanilla whip.

The Mourningstar is a craftable post-Moon Lord flail that is the direct upgrade of the Solar Eruption. Similarly to the Solar Eruption, the Mourningstar fires two solar spear-like projectiles that extend and retract from the player's position, following a narrow arc in the general area of the cursor for the duration of their travel. The flails have infinite piercing capabilities, ignore tiles, and create explosions when hitting enemies. Both the flails and the explosions created inflict the Daybroken debuff on enemy hits.

Its best modifier is Godly. It cannot get modifiers that affect size. Ruthless might be preferred if the player already has 100% critical strike chance.



Used in


  • Mourningstar's name is a pun on the term "Morning Star", a name given to certain pre-sunrise sky objects or to a type of spiked mace, and the word "mourning", which means to grieve over someone's death.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Increased sell price from 24 Gold Coin to 30 Gold Coin.
    • Decreased Daybroken duration from 5 seconds to 3.
    • Moved Solar Eruption to the top of the recipe.
    • No longer considered a fire weapon.
  • Buffed hit cooldown from 10 to 4. Explosions now use local immunity frames. The flail itself now has 1 extra update, making it twice as fast.
    • Fixed weapon not cutting grass.
    • Fixed only one of the solar whip swords appearing.
    • Fixed tooltip saying it only fires one solar whip sword instead of two.
    • Fixed it still using the Rarity Level: 14 rarity instead of Rarity Level: 12.
    • Fixed it having the wrong sell price.
    • Nerfed damage from 650 to 230.
    • Decreased sell price from 36 Gold Coin to 27 Gold Coin.
    • Now uses 6 Cores of Chaos, 6 Cores of Sunlight, and 6 Divine Geodes in its recipe instead of 5 Cosmilite Bars and 5 Phantoplasm.
    • Now requires an Ancient Manipulator to craft instead of a Draedon's Forge.
    • Buffed use time from 12 to 9.
    • Tooltip now mentions that its effect occurs on hits in general instead of just enemy hits.
    • Now uses custom whip projectiles instead of reusing Solar Eruption's whips.
    • Resprited.
  • Now requires a Draedon's Forge to craft instead of an Ancient Manipulator.