Simple logic
You can do it in response to being attacked, kicking the attacker out of the game for a bit, or you can use it to reset any enter the battlefield effects you might have
It starts out with Yuto, the Dark Duelist, mostly about who he is, why he looks just like Yuya, how he knows Yuzu and what happened to him
This Amber and Emerald starter deck focused a lot on the Dalmatian puppies , which also included a new way to play, by allowing a player to have up to 99 copies of the tail wagger cards in one single deck though, the starter deck did not do that, thankfully
Not a collector, not a fan investors treating trading cards as serious assets
Sevinne offers an interesting build around as he supports not only flashback, but also aftermath, retrace, and jump-start to really carve out a graveyard spells-matter archetype, leagues clearer than before