"The Proto-Warriors are trying out something new this time. Dropping down from their Guardian dropships, these Forerunner Skiffs are low-level gliders, or speeders if you will. They might quite possibly be what the Covenant engineered the Ghost from.
What they lack in aerial dominance, they make up for in intense speed and armor. .."
This is a sketch from the latest Shield and Sword update that has been posted, imagining through art and text what the fourth level of an imaginary Halo 4 might be like if I designed. See and read a bunch more about it here:[link]