Can you stump the Almighty Fanatic?!

[Garnet17th]

BruisedNails

+.+

Well, I read PS, so it SHOULD be the same, yet, may be different.
*Ahem*

Danger lies before you, while safety lies behind,
Two of us will help you, whichever you would find,
One among us seven will let you move ahead,
Another will transport the drinker back instead,
Two among our number hold only nettle wine,
Three of us are killers, waiting hidden in line,
Choose, unless you wish to stay here forevermore,
To help you in your choice, we give you these clues four:
First, however slyly the poison tries to hide
You will always find some on nettle wine's left side;
Second, different are those who stand at either end,
But if you would move onwards, neither is your friend;
Third, as you see clearly, all are different size,
Neither dwarf nor giant holds death in their insides;
Fourth, the second left and the second on the right
Are twins once you taste them, though different at first sight.

PHEW!

+.+

GUYS:

I hope you all know that cheating is not allowed in this game. That means no looking for references in books and/or the internet. There is absolutely no way you can remember the whole riddle, word per word, including right punctuation and phrasing. I can understand it's possible, but the chances of this is highly unlikely.

I also want to clear this up:

Hard questions containing exact numbers shouldn't be permitted. Like the above, there is no way you can memorize an exact number like 1,012 to 1,056. I know it's fun making hard questions, and it is fun racking our brains to find the answer, but when you ask impossible questions that can only be found via book or net, is not fair for the current Fanatic and is also not acceptable.

-Garnet


Edit: After discussing this with the Headmistress, it has been decided that the title should go to Serenity Silvia Malfoy for her outstanding questions and tenacity.