I think that this list no longer belongs to Spring Tide Trhead, this is why I started this one for everyone who want sto talk about it. The list below is just my idea of the deck, but it is still very open, so I expect more people posting their versions here (mono color or with different splashes) so everyone can discuss, and hope that together we find a final strong list.
"N.S.T. - Negation Spiral Tide"
Main deck 60
4x Force of Will
4x Pact of Negation
4x Merchant Scroll
2x Cunning Wish
4x Explore
4x Brainstorm
4x Ponder
4x Preordain
4x High Tide
1x Brainfreeze
4x Time Spiral
3x Turnabout
3x Tropėcal Island
7x Island
8x Blue Fetch (2 each)
Sideboard 15
1x Brainfreeze
1x Stroke of Genius
1x Meditate
1x Turnabout
1x Wipe Away
2x Krosan Grip
1x Slaughter Pact
1x Reubild
1x Snap
1x Mindbreak Trap
4x Spell Pierce/Dispel (to make the mirror, or the match against ther combo, stronger, I ' m fan of spell peirce over dispell since it is stronger against Tendrils storm, to protect discards and counterbalance, though dispel is better for the mirror.)
Mian game plan: deck your opponent with a single big brainfreeze (or make him/her draw with an Stroke of Genius). To do this you have a new Weapon time spiral. In this shell 2 very regular and strong plays (so you can go off by turn 3) are like this:
Turn1: land (cantrip optionally)
Turn 2: land + explore + land
Turn 3: land + high tide + Time Spiral
or
Turn 1: land (cantrip optionally)
Turn 2: land (cantrip(s) opotionally)
Turn 3: land + high tide + turnabout (on you chosing untapping lands) + Time Spiral
This doesn't pretend to be a primer so if you have any questions about card choices or anything else relevant about the deck, feel free.
Greetings,
Iņaki.-

