This both speeds up your endgame while letting you recycle resources for later
Even with the modality this is still a pretty narrow card and needed a good push to look viable) Even a smattering of well placed anti flier cards is not solving the problem, it is just a part of the way there
Don't be fooled by the advertised mana cost: Delve makes it much easier to cast, frequently bringing it down to just two mana, and often entering play as a 5/5 flier or bigger
Cards Added Ash Barrens Austere Command Bident of Thassa Dennick, Pious Apprentice Generous Gift Guardian of Faith Kabira Takedown Katilda, Dawnhart Martyr Kira, Great Glass-Spinner Makindi Stampede Malevolent Hermit Mausoleum Wanderer Mind Stone Mischievous Catgeist Mystic Reflection Nimbus Maze Patrician Geist Selfless Spirit Skyclave Apparition Spell Queller Cards Removed Angel of Flight Alabaster Azorius Chancery Azorius Locket Breath of the Sleepless Disorder in the Court Fell the Mighty Flood of Tears Geist of Saint Traft Ghostly Prison Kami of the Crescent Moon Kirtars Wrath Nebelgast Herald Oyobi, Who Split the Heavens Promise of Bunrei Rhoda, Geist Avenger Shacklegeist Sire of the Storm Temple of the False God Timin, Youthful Geist Verity Circle The total cost of this upgrade is roughly $60
There are other Borderless cards in the set, but I feel its important to go over the math on those and the Movie Posters too