Before I begin, I must say I loled at the Burger pokemon conversation going on. Also, this will be a pretty big post.
Okay, here are my sketches. I'll start off with the Death Worm...
I started off trying to make a cute wormy, but it just wasn't cutting it for me. They didn't strike me as defensive enough. So I decided to show it by giving it an armored look.
The armored segments look constrictive, but it's not actually connected to its flesh. In order to move through the earth, rather than using its jaws it spins the armor segments rapidly, drilling through the earth. Even on the surface, by rapidly spinning the armored segments it can travel incredibly fast. The crystals on its lower body look like eyes, but it is actually blind. It uses those crystals to sense any prey on the surface, and to protect itself.
This is the second design, my hybrid spider creature. As I said in a previous post, this is a combination of a Trap Door Spider, a Daddy Long Legs, and a Jumping Spider. The fore-claws are used for digging, which is a trait of Trap Door Spiders (technically Tunneler, but meh). The body has no abdomen, like a Daddy Long Legs. Finally, the hind legs are this creature's most powerful part of its body. This gives it the ability to jump, which is the Jumping Spider's trait.
This creature uses its large fore-claws to dig traps in the desert, in which it hides. Once some prey approach the trap, it quickly springs right out of the hole and tries to drag the prey down to poison it. The reason it doesn't strike the prey with those monstrous fore-claws is that the fore-claws are so large, it can't use them to attack prey. They're built for raking inwards, not lifting and striking. It can stay underground for a long period of time because it requires no water. Instead, it drinks oil found deep underground. The oil it drinks is visible on its body. If it is forced to surface, it goes into a defensive state instantly. It tries to spray the enemy with the oil, which has been in its body so long that it becomes poisonous, to startle them and stall so it can dig another hole to escape. If it feels the enemy has been sufficiently weakened by the poisonous oil, it springs out of its hole once more and drags the enemy down to feed on it.
Well, here they are. I personally like the worm better, but the spider has more development.
Edit: Also, they are not colored because I haven't yet decided what colors to give them. Meh.