Answer:
It is the great nemesis of the lactose intolerant.
A mother had five boys Marco, Tucker, Webster and Thomas. Was the fifth boys name Frank, Evan or Alex?
They try to beat me, they try in vain. And when I win, I end the pain.
It stands upright and can be quite grand. Its secret is not hidden but right at hand. What is it?
I am the tool, for inspiring many. Buy me in the store, for not much more than a penny. Don't overuse me, or my usefulness will go.
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?