One might go so far as to call it a mandatory pick
Maybe in Tempest s and Time Spiral s time there was a meta where youd have to worry about your opponent running shadow creatures as well
Celebrate 30 Years of Magic: The Gathering with 30th Anniversary Edition To celebrate 30 years of Magic: The Gathering , we knew we had to go big

Example Decklist: Selesnya Ouroboroid in Standard Ouroboroid | Illustration by Samuel Perin Planeswalker (1) Creatures (28) Agent Bishop, Man in Black x2 Ambitious Augmenter x2 Badgermole Cub x4 Dyadrine, Synthesis Amalgam x2 Leatherhead, Swamp Stalker x2 Llanowar Elves x4 Michelangelo, Weirdness to 11 x3 Ouroboroid x3 Pawpatch Recruit x4 Surrak, Elusive Hunter x2 Instants (2) Erode x2 Sorceries (4) Enchantments (2) Seam Rip x2 Lands (23) Abandoned Air Temple x3 Forest x7 Hushwood Verge x4 Multiversal Passage x2 Plains x2 Starting Town Temple Garden x4 Sideboard (15) Ba Sing Se Defend the Rider x2 Elspeth, Storm Slayer Erode Keen-Eyed Curator x2 Rest in Peace x2 Scrapshooter x2 Sheltered by Ghosts x3 Surrak, Elusive Hunter Green monsters are no stranger to Magic, and I bet that 10 years from now, a heavy green deck can rock a low curve and competitive

(It can't be blocked except by two or more creatures.) If the target creature isn't both attacking and equipped when Item Shopkeep's ability tries to resolve, it won't resolve and none of its effects will happen