It effectively shrinks your deck so that instead of running 60 cards, you can run 56 (with some little timing hiccups)
Drawing your whole deck, sacrificing your Chasm Skulker and then running the board down with 90+ Squids is always hilarious
This kind of effect just doesnt matter if you dont have the right deck for it

All-Seeing Arbiter Anje Falkenrath Bag of Holding Bone Miser Brallin, Skyshark Rider Cam and Farrik, Havoc Duo Captain Howler, Sea Scourge Conspiracy Theorist Containment Construct Containment Construct Cool but Rude Cryptcaller Chariot Currency Converter Diviner of Fates Doctor Doom, King of Latveria Dying to Serve Feast of Sanity Glint-Horn Buccaneer Green Goblin, Nemesis Hashaton, Scarab's Fist Hobgoblin, Mantled Marauder Inti, Seneschal of the Sun Ivora, Insatiable Heir Lady Spider, Maybelle Reilly Lazotep Chancellor Magmakin Artillerist Marauding Mako Mary Read and Anne Bonny Midnight Oil Mishra, Excavation Prodigy Monument to Endurance Moonstone, Harsh Mistress Mystic Redaction Necropotence Oskar, Rubbish Reclaimer Pitchstone Wall Pyre of the World Tree Rielle, the Everwise Scrounging Skyray Shipwreck Sifters Spider-Man, New Champion Surly Badgersaur Toluz, Clever Conductor Urza, Powerstone Prodigy Veronica, Dissident Scribe Wharf Infiltrator

This deck also makes great use of Tsukuyomi in order to reset your flip monsters