One day, the King ordered me to visit the city of NASA to find a rare herb to cure his daughter's illness. However, upon arriving at the city's gate, a guard stopped me.
"Hello, why are you here?" started the guard.
"I was sent by the King to find the magic herb."
"Well, but you can't," the guard explained, "the herb you are talking about is wanted by lots of people, therefore, the new policy states that only the citizens here may use it. Moreover, since too many robbers are around recently, I am ordered to forbid any outsiders from entering the city."
"Are you trying to stop an envoy of the King?" I replied.
"All right. To prove you are the King's envoy, and since envoys are geniuses, you must name all the seven creatures living in this city. Now!"
"Whaaat? No way. Do you think I am a genius or a psychic? It's impossible."
"Aha, it is indeed. But the clues are on the wall over there"
Curious, I immediately walked to the wall pointed by the guard. Riddles! Could it be worse? Since riddles are my only weakness (well, to be honest, dragons too), I take a photo of it and publish it to P.SE., with the hope that someone can crack it.
A chameleon, looks quite purple
With a hammer, it's rather immortal
In France, it looks like two
And Russ is one of the few
It's a quick Welsh wing
4152 he once did sing
It's the continuation in the Alp'bet
The grass grow you should not let!
It's the shortest among the it's folks
Just a letter and two simple strokes
It's the perfect middle of the list
It is known for its ability to resist
It's red, it's cardinal, it's expensive
And it's the beginning of the offensive
Can anyone help the princess? Well, of course, it's me. I mean, can anyone help me figuring out the 'seven creatures' so that I can pass the guard?
PS: I cannot fly, no other entrances exist, and the use of 4-dimensional spaces is strictly forbidden. No lateral-thinking here.