This is likely mostly down to the license, of course, but the Spider Man IP holds quite a lot of weight as well
Not only is this a merfolk-themed deck, but the instant-win trigger allows you to literally win by exploring hard enough
The deck has tons of interesting tech, from Majestic Genesis playing 12 cards from the top of our library to Dragon Throne of Tarkir being a massive overrun to Ezuri's Predation wiping out smaller creatures and providing a discount to Ghalta to one-shotting people with a surprise Boon of Boseiju on Ghalta
For an in-depth explanation of these formats, check out my article All MTG Formats Explained
My second functional deck followed a stun combo called Pickles Control, a combo that prevented your opponents from ever having an Untap phase, leaving their entire field useless while you rolled over your opponent
The new Slow Lands are some of the best dual lands to come out of the past few years, and theyre poised to become a Commander staple