As for now, these summons are not natural born animals. They are summoned from lets just say another plane of existence, like How Fjeld uses the Plane of Ghosts, so he might feel akin to theses creatures. Lorronix and Adam whoever, cannot... "Bond" with these creatures, because they are not "natural" to this world. You can try, and it would make sense to do so, but the creatures are violent (This is for Adam mostly) he will violently rejected and knocked back, possibly losing consciousness or just burning some skin.
Oh yeah, this snake is just a simple Auto attackable creature... So... Red I think was the colour for auto attackable, just don't instant kill it.
Anyways, I should have gone into more detail about the snake, but my girlfriend was coming around so I rushed.
The snake kinda looks like an anaconda, being around 3 and a half meters in length, and a body of around 10 centimeters in radius (Hell yeah metric system). It has 2 fangs, they are as Grimm said like dagger sized, and secret a small numbing poison, so with one bite or spit, the prey can't run away well, or will not feel being eaten.
Oh by the way it can spit poison, oh yes it can indeed.
Oh and it's pretty much pitch black to a really dark shade of green.
The snake dodged quickly the first arrow, at least from hitting it's head. The arrow went past and skidded past its scales and down it's body. The second one hit it's mark, but only seemed to anger the beast. All of the items hitting the body of the giant snake just bounced off, and it reared up, and spat a large green ball at Variava, aiming to paralyze the one who is the only current threat to his existence.