The Anarchy league and Onslaught league ran from June 8, 2013 to October 8, 2013.
The attack, cast and movement speed of monsters of Wraeclast has been increased. Like a lighter version of the Turbo race events, lasting for four months.
The Onslaught challenge league was a four month hardcore league that was aimed at players who are looking for more challenging gameplay. In this league the attack, cast and movement speed of monsters was increased. In this regard it had been characterized as "a lighter version of the Turbo race".
It was announced on May 31, 2013, along with the Anarchy league and started on June 7, 2013. It ran until October 7, 2013. At the end of the league surviving characters and stashes were moved to Hardcore league. As with regular Hardcore, characters that die during the four months were moved to Standard immediately.
All areas had
20% increased Monster Movement Speed
20% increased Monster Attack Speed
20% increased Monster Cast Speed
Onslaught had six exclusive base item types (all shared with Anarchy) and four exclusive uniques (two of which are shared with Anarchy). Two base types, Onyx Amulet and Prismatic Ring, and the unique Kaom's Heart were disabled in both Onslaught and Anarchy. After onslaught ended, the new base items were implemented in the regular leagues aswell. The exclusive unique items did not, but may return in the future.