Family: Clusters
Crystal: Fire
Weak against: Fire
Resistant to: Blind, Sleep (builds up resistance), Paralyze
Notorious Monster

Unstable Cluster

Zone Level Drops Steal Spawns Notes
Riverne - Site #B01 56 - 57 1 A
~10,000 HP
A = Aggressive; NA = Non-Aggresive; L = Links; S = Detects by Sight; H = Detects by Sound;
HP = Detects Low HP; M = Detects Magic; Sc = Follows by Scent; T(S) = True-sight; T(H) = True-hearing
JA = Detects job abilities; WS = Detects weaponskills; Z(D) = Asleep in Daytime; Z(N) = Asleep at Nighttime; A(R) = Aggressive to Reive participants
Riverne-siteb01 NM

The ??? appears at (J-9).


  • The entrance to the cave is located at the southeast corner of (I-9).
  • The ??? respawns 15 minutes after the Unstable Cluster is defeated.
  • Nitro Clusters, which drop the Clustered Tar, can be found near the ???.
  • Builds resistance to sleep quickly and becomes very hard to sleep after 3-4 successful sleep spells.
  • Soboro Sukehiro's drop rate is not affected by the number of bombs left in the cluster at end of the fight, contrary to popular rumor.
  • Soloable by several jobs. (see testimonials)


See the Video page.

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