The time starts as soon as Gimme Five starts resolving
The announcement only has details for the Sakura Superstar batch, which consists of the following six cards: Harmonize Inspiring Vantage Miku, Lost but Singing (identical to Azusa, Lost but Seeking) Miku, the Renowned (identical to Feather, the Redeemed) Mikus Spark (identical to Chandras Ignition) Shelter As you can see, half of the cards are just Hatsune Miku variants of already existing cards, but theyve got some fantastic art (I especially like the look of the Inspiring Vantage card), and theyre a nice alternative for those who want to run a themed deck based around the Vocaloid idol
But a product like Secret Lair doesnt need to be confined by that constraint and Pride Across the Multiverse gives us a glimpse at a game of Magic without the conflicts, or at least taking a pause from those conflicts
A common theme in the Dragonstorm precons is the alternate commander not being useful in its deck, with Ureni being more of a Dragon commander instead of one that supports what Temur Roar is trying to do
Legality depends on the tournament format -- Sauron, the Necromancer can be legal in some formats and banned or restricted in others