Flood Barracks

The Flood Barracks are organic structures that ceaselessly churn out a variety of Flood forms and will be featured in the Halo Wars.

They can't be destroyed by "conventional" weaponry, but players can damage them enough to force them into a withered, dormant state. The effect is only temporary, and given enough time, the Barracks will recover and begin producing more Flood forms. It is speculated that the Flood Barracks will only produce Pure Forms as it is a natural "building" and Combat Forms require a host to be created.