FAFrontier ArcanaField Dossier

Bosses

Obsidian Colossus

The structure-pressure boss for Mason work, roads, ward foundations, and coordinated town defense.

Linked item: ward_foundation - rare - profession

09Dossier 3Sections 9Field notes 3Linked pages

Why Choose It

Obsidian Colossus is a town-defense boss. It is designed for groups that need Mason outputs, ward foundations, and practice keeping a heavy target away from civic infrastructure.

  • Choose it when roads, stonework, or ward foundations are the current bottleneck.
  • Bring Mason stock, defenders, and a planned fighting area.
  • Keep it away from town centers and exposed station rows.

Mechanics

The Colossus uses Siege March, Anvil Quake, Magnetic Grip, and Scrap Shield to punish sloppy positioning and weak structure defense.

  • Pull it back toward the event site when it starts moving toward structures.
  • Spread during Anvil Quake and regroup after the shock.
  • Break shield pressure before expensive damage windows.

Reward Route

Its rewards make towns physically safer and more organized.

  • Stonework Bundles and Ward Foundations support Lantern Ward and road planning.
  • Ward Anchors connect Colossus attempts to Corruption Breach readiness.
  • Use early wins to harden the town before harder raids.

Practical Checklist

  • Read the summary, then verify the live map for current server state.
  • Use related dossiers to follow the gameplay dependency chain.
  • Bring the listed item or station resources before attempting the loop.