Cast it with Narset, Enlightened Master, Jodah, Archmage Eternal, or The Infamous Cruelclaw
Time Warp is the best for its mana cost, Temporal Mastery makes your early game more explosive and is fine late, Walk the Aeons allows you to chain together multiple turns off one card when you need it, Temporal Trespass can be absolutely clutch when you need to both Time Walk and play another Howling Mine effect, and Part the Waterveil is your win condition
Outside of this option, Flash Photography is also notable for coming down at instant speed when it targets your own stuff
There's a case to be made for any of them, and we've had the pleasure of testing not only Silverquill, but the Quandrix Unlimited and Prismari Performance decks, too
And you know who bought it