Another Livechamber doodle focusing on a Campaign element: pets!
Think Mordecai's Bloodwing out of Borderlands mixed with Castle Crasher's Animal Orbs mixed with the Engineers from Halo 3: ODST. Pets are "superbabies" you can find in dungeons guarded by platoons. To clarify on how these things would work in combat, there's a quintessential substance called Aether that's a bit of a mix of the fountain of youth + phazon that exists in the dyson sphere that's rapidly accelerated the local races, cultures, and technology. Cats, being the highest possible state of reincarnation in some religions, become a Soul pet, functioning as Metal Slimes (rare and high HP but very rewarding). Horus (top-left) has some sort of Mind Eagle. Vita's using a Sceraphid larva, whose hardy exoskeletons mean they can be used as melee weapons. The little bottom-middle dude is an attempt at an Aether elemental pet.
There are two things you can do upon encountering a pet: kill the pet itself to stop it from juicing up the platoon guarding it,
or go in for the long haul and kill the amped-up platoon, at which point the lone pet will befriend you. You can go up to a pet and pick it up using the Action button, at which point you can select one of four bonuses available with the DPad. Once you've chosen one of the four bonuses, the pet cannot perform any other bonuses, and will disappear/leave after being killed by enemies or if you die.
For example, a cat's bonuses are Soul Bomb (all of your grenades will begin to orbit around the floating cat and you can chuck it like a grenade for massive damage but at the expense of causing the cat to teleport away before detonation), Rapid Regen (rapidly restores shielding for you and your nearby teammates), Power Fist (Fisticuff attacks come out at twice normal speed), and Zero G (self-explanatory). You can also burp a Sceraphid larva to make it spit up some oily goo that'll leave a flammable trail on the floor, which can be good for traps.
Considering Bloods are purebred humans (and tend to be archers), I might make the Blood pet a cherub. No idea, though. Took about 45 minutes for both doodles combined, Wacom Bamboo, Photoshop CS5.