Basing is a critical part of the painting process. Armies on the battlefields of the 41st Millennium or the Mortal Realms will find themselves fighting across a wide variety of terrain, from lush jungles to barren rockscapes, industrial wastelands...
The painter: Richyp (again)
The battletome: Grand Alliance Chaos (all the stuff)
Collected: In stages over the last couple of years
This army started out as the 5 Blood Warriors and Blood Reavers from the cheap Age of Sigmar starter...