|Ostreum Island of Midnight Ocean|
|Medium island in Pearl Archipelago|
|Controlled by Superlemon Krakatoa|
|Governed by Clawsofdoom|
|Navy color: Aqua|
Natural Resources Edit
Ostreum is currently ruled by Superlemon Krakatoa.
Ostreum II — 2005-02-26, Black Sheep Brigade dropped a chest on Ostreum. Notorious Fandango dropped a chest during the middle of round 2, winning rounds 3 and 4, but losing round 5. Notorious Fandango also finished with more points than other faction in round 2, but game mechanics prevented them from being listed as a contender until round 3. Thus, Ragnarok won rounds 2 and 5 and successfully defended the island.
2005-7-04 — Ostreum is converted from an outpost to a medium island.
Ostreum IV — 2005-07-17, Overwhelming jobber support for Superlemon Krakatoa, coupled with a smaller showing from Phoenix Reborn, helps Superlemon Krakatoa take Ostreum. Phoenix Reborn did not contend round 3.