The Dark Moon Greatsword in Elden Ring is mainly a strong Intelligence- focused weapon you get for completing Ranni’s questline, and its big value is that it boosts magic damage and adds frost buildup with its weapon skill. It’s popular because it scales well for sorcery builds and has a very powerful charged-beam attack, not just because it looks cool.

What it’s for

  • It rewards finishing one of the game’s longest questlines.
  • It gives magic damage, Intelligence scaling, and frost buildup.
  • Its skill temporarily powers up the sword and sends out moonlight on charged attacks.

Why people use it

  • It fits mage or hybrid mage-melee builds very well.
  • The frost effect adds extra pressure in PvE and PvP.
  • The weapon skill lets you fight from safer range than a normal greatsword.

In plain terms

If you’re asking “what’s the point,” the answer is: it’s a late-game reward weapon for Intelligence builds that trades pure physical damage for magical power, frost, and a very flashy skill.

TL;DR

It’s basically the signature greatsword for magic builds: strong scaling, frost, and a moonlight beam skill, unlocked through Ranni’s questline.