While not repeatable in the same way Time Vault is, Time Walk doesnt require other cards or hoops to jump through to cast
Additionally, for the cost of four generic mana and tapping, you can sacrifice Throne of the High City to become the monarch
There arent enough aggressively costed red removal spells worth playing
Though there's no extra content included, it's the perfect way to fill out your deck or even better for collectors to get the cards they need
If you have Metallic Mimic in play and cast something like Battle Screech, all the flying tokens enter with a +1/+1 counter, so it works wonders with go-wide decks
Prosper, Tome-Bound requires considerably more setup to use optimally, but if your deck is already playing a lot of cards that let you play cards from exile, the value it generates from its Treasure tokens can be absolutely silly