Quick Scoop: In Reign Piece, gravity fragments are mainly used as a crafting/material currency for certain upgrades and items, and recent guides point to boss farming and related fragment systems as the core way players obtain them.

How to get them

  • Farm bosses that drop fragments, especially the bosses mentioned in current guides like Shanks and Mihawk.
  • Use boss-token or repeat-spawn methods if the game mode supports them, since that speeds up fragment farming.
  • Complete the relevant quests or progression steps that unlock fragment-related rewards and crafting access.

What they’re for

  • Players use gravity fragments for things like dash color changes and certain crafting requirements tied to progression.
  • A recent guide specifically says some upgrades need gravity fragments plus hockey fragments and pressure cores.

Practical tip

A fast loop is to target the bosses that drop fragment mats, then spend them on the specific NPC/craft you need instead of hoarding them blindly.

The latest public discussion is pretty guide-driven rather than official, so the safest answer is to farm fragment-dropping bosses and follow the in-game crafting/NPC requirements.