The best Yurlok decks look for ways to make sure that the opponent cant make use of that extra mana while you can still reap the benefits
Making all your nonland permanents five-color does some niche cool things, like turn Iridian MaelstromIridian Maelstrom into a Plague WindPlague Wind, Infinite Guideline StationInfinite Guideline Station into a hand refill, and Jared CarthalionJared Carthalion into an incredible pump spell
Very Shadows over Innistrad , with spirits and investigating, but brought up to a more modern rate
If another ability triggers during the end step and puts a +1/+1 counter on a permanent you control, you won't put an additional +1/+1 counter on Fairgrounds Trumpeter
However there are a few pitfalls: A single riffle/mash shuffle wont move the cards near the top and bottom of the deck very much
The number of spider-related cards and creatures that were simultaneously heroes, spiders, and most confoundingly, humans was what first made me perk up about this release