Answer:
A large oasis in the desert. Come with cash and leave with none. What am I?
A single syllable do I claim black was my most famous name; Fetal to mortals here below thousands have I slain in a single blow.
Goes over all the hills and hollows, Bites hard, but never swallows.
I have a few points but we're not competing. I'll help you win when you're eating. What am I?
I have no head and a tail I lack but I do have arms and legs and back; I inhabit the palace the tavern the cot 'tis a beggarly residence where I am not. If a monarch were present (I tell you no fable) I still should be placed at the head of the table.
For our ambrosia we were blessed, By Jupiter, with a sting of death. Though our might, to some is jest, We have quelled the dragon's breath. Who are we?