alright well if you want to just goldfish your opponent the best way to do it is simply:
1. put back force drain
2. Drop acadamy
3. tap sol ring cast merchant scroll for gifts
4. cast time walk
5. take timewalk turn (draw irrelevant card)
6. play sea
7. tap vault island cast gifts for ruby petal will saphire
8. if you get ruby petal simply crack petal tap sol ring cast tinker for lotus
9. use lotus sea ruby to cast will with recoup
10. replay lotus saphire petal and using the saphire cast vault
11. tap acadamy for 6 and vault for 3
12. using u1 cast merchant scroll for mystical
13. mystical for b-wish
14. brainstorm into b-wish
15. using petal cast b-wish for tendrils
16. cast tendrils off your lotus

note: if you get saphire instead of ruby  or saphire ruby the it should still all work out

now if you assume your opponent has one counter

then the tendrils kill this turn is not that fantastic and you should just go with the easy out of cast tinker walk after putting sea recoup on top and have double counter backup after you untap. Note: you could toss back the drain instead of the recoup and when you untap if you draw a red source you get to recoup walk and win and if you dont then assuming you draw an artifact you will have the mana to scroll a recall and cast it and if you draw a red you still win. As well if you find draw a brainstorm then a red source you can win.

one other thing is that it would be easier to solve if we knew what your opponent discarded, did you opponent pitch any blue cards( if they didnt i would goldfish them if they did i would go with the tinker walk double counter debating heavily on keeping the recoup) 

I knew that they sideboarded in

• 3 Envelop
• 3 Duress
• 0 to 1 Tendrils of Agony

I knew they left in 2 copies of Misdirection.  I know this because they showed me what they were sideboarding.  I played another guy who was playing Pitch Long, and he boarded in a similar number of cards, leaving in Misdirections.

Hence I believe they lost the mirror match partly because of luck, but partly because they sided out too many bombs/kept hands with too much protection and too few action cards.  This is why I think that my sideboarding of Misdirection for Duress (all 3), and Necropotence out for Tendrils, because Necro makes it too easy to lose the mirror match (since when you go down to 8 and pass the turn, you give them a chance to Tendrils you with only 4 or 5 storm to win).

Once again, the reason why running the second copy of Tendrils is bad:

• if you're cutting misdirection for it, you lose protection which saves you against control
• if you're cutting a bomb, you lose accelerators which helps you get the first turn win
• maindeck is rarely played, and losing to it is more unlikely, in my opinion, than losing to not having the bomb/acceleration/protection that you cut for the second copy of Tendrils
• Reaching ten storm (or higher) is almost never a problem when you are actually good at playing storm combo decks, and a second copy of tendrils doesn't really save you here.

I apologize for the quality of my earlier post, it was written in haste.

Alright all of this has become annoying enough that i went out and got a Marna drain account. Firstly there is no reason to run tendrils number 2 mainboard. I hear everyone talking about how it is hard to reach lethal storm or loosing b/c of discarding tendrils in a necro or your tendrils is in your jar hand. That is not a reason at all, you simply are not being ingenuitive enough. I have not once ever had trouble reaching 10 storm and i generally finish at about 16-22. This deck loves all the accelerants and cutting something like mis-d number 3 is not right. I get so many turn 1 and 2s from having a single mis-d or force in hand to protect that bomb like bargain. And on the extract note i have a question for everyone: How many people have actually lost even a game 1 to main deck extract. It almost never happens its much more common in the board. So i do advocate tendrils number 2 in the board. Though in this deck colossus is not needed. Now all that being said i do see one other problem other than the natural bad plays made by storm combo players. That is that people are oversidboarding for matches. As an example against team gws at gencon they were bringing in duress and envelop and tendrils # 2 if i am not mistaken. By comparison i brought in 3 duress and in tendrils # 2 (though the second tendrils is not needed but i brought it in incase they brought in extract for game 2) and took out 3 mis-d and 1 necro. i beat Becker and Endress in each mirror b/c they over sided. They kept hands with protection and i kept hands with bombs. They lost b/c this deck does not really care too much about protection until the later turns. This deck does not usually let your opponent get to the later turns. So when sideboarding consider this.

Side note: Stax is a little different b/c of the nature of the deck vs yours in that match-up you can side more without hazard b/c you are not unlikely to win quick if they have a turn.