This deck is a variation of the traditional Bridgevine deck that was shown off by Saffron Olive on MTG Goldfish. He quoted the deck to be made by one NaPaulm314.
The cornerstone of the deck is built around abusing pitching Bridge from Below to the graveyard, then casting a multitude of x-spells for zero, causing them to insta-die and give us free Zombie tokens. If you can string together at least 2 or more of these x-spell creatures in a single turn, you can abuse the recursive effect from Vengevine , which lets you get a big board, very quickly. Hence, Bridge-vine!
Where I have differed the deck is the use of a blue-based mana source. I do think Red has the ability to pitch cards very quickly, and thanks to Stitcher's Supplier being added, the graveyard buildup is quite a bit more consistent. However, I will say that some of the frustration in using this deck comes from players letting their creatures simply die to an attack of ours, or possibly just swinging for beats with some big dumb creature like Death's Shadow or Emmy, the promised end. Also, our stitchers will more than likely never die, since our opponent will simply take the 1 every turn instead of blocking to let us self-mill for more bridges.
I've added in Sidisi's Faithful as a work-around for creature removal, and dodges the "creature an opponent controls to their graveyard" stipulation to lose our Bridges. Also, thanks to Exploit, we can sacrifice our Stitchers and get an additional 3 cards. Finally, I've brought in Ideas Unbound as a way to get better card selection and still maintain the pitch-effects that cards like Faithless Looting and Insolent Neonate give, while still giving me access to some small card advantage on top of the pitch effect.
This is still a VERY rough draft, and if anyone has any advice, I would appreciate the feedback. Still trying to decide on the sideboard, which isn't set, and I'm still testing the main deck to find the most consistent way to play it.