This week's world boss Valinor can be found in Bastion.

From the Adventure Guide:

Valinor, the Light of Eons

Built by the Kyrians as a means of testing their hardened warriors, Valinor is a centurion of great power. Taken by the forsworn and infected with the seed of doubt, Valinor now sees all foes as challengers.

Valinor can be found at 26, 23 and will give you a guaranteed 250 anima as well as a shot at the following loot. 

Drops

 Doubtweaver's Handwraps

 Anima-Charged Wristbanding

 Servo-Chain Waistguard

 Oversized Centurion Helm

 Valinor's Ground Pounders

 Shroud of the Penitent

 Memory of the Final Verdict

 Memory of Archbishop Benedictus

 Memory of the Windspeaker's Lava Resurgence