First, if your sideboard is full of silver bullet creatures / hate creatures against specific match ups, you can get rid of a useless mana dork in favor of your tech in game 1
27, and Wizards of the Coast took the opportunity to introduce the world to some of the products that'll be available as part of April's Secrets of Strixhaven and June's Marvel Super Heroes sets
Go Wide
Use any of the typical untap effects available like Thornbite Staff and any sacrifice outlet, or just copy Zealous Conscripts over and over for an infinite number of token copies, ETB triggers, and untaps for Kiki-Jiki
While other options like Geier Reach Sanitarium and Bonders Enclave are good too, War Room is probably the most universal and easy to activate
Unfortunately for anyone looking to open these packs, this also means big price tags get attached to them