Necrons, The Decurion, and Tournament Formats

The aspect of the new Necron Codex that certainly stands out the most is the abundance of formations and the Decurion Detachment. The decurion creates a new way of forming a Battle Forged army that is arguably bordering on Unbound. This is because, while the mandatory selections are expanded, the flexibility after fulfilling those restrictions is endless, and allows numerous formations in a single detachment, with some very strong bonuses.