The best public info I could verify is that Demonic Wisp in Blox Fruits is a rare material dropped by Demonic Souls , but I couldn’t confirm an official drop rate from the sources I found. Community reports suggest it’s around 1% or “very low,” but that’s not an official number.

What that means

  • You may need to defeat many Demonic Souls before getting one.
  • Players commonly describe the drop as uncommon to very rare rather than reliable.
  • If you’re grinding for Hallow Scythe upgrades, expect a lot of farming time because the material is used in multiple upgrade steps.

Practical read

A reasonable estimate from the public chatter is:

  • About 1% per kill from player reports.
  • Possibly a bit higher or lower depending on luck, server conditions, or any hidden game changes, but I couldn’t verify a newer official patch note.

Quick tip

If you’re farming them, focus on Haunted Castle in the Third Sea and keep clearing Demonic Souls continuously, since that’s the confirmed source.

TL;DR: Hollow/Wisp-style drops in Blox Fruits don’t have a confirmed official rate from what I found, but the community estimate for Demonic Wisp is roughly 1% and definitely rare.