These saga creatures have a final ability that exiles them and returns to the battlefield, front face up, before you have to sacrifice it
For example, Heiko Yamazaki's triggered ability won't trigger if you attack with multiple creatures and all but one of them are removed from combat
As Jake notes, Players cant realistically use a lot of their expensive Standard cards in other formats because their power level fades compared to many cards from supplemental sets
Not every UB set is making a smooth transition to digital platforms, however
In the case of Pokmon, it is of course the same, except for the detail that we dont have an official ban list for standard format (which is the one that is officially played) and it is extremely rare that we see an emergency decision from the Pokmon Company itself
Maelstrom Pulse doesnt have the drawback, and can be used to clear multiples, but also costs more and is a sorcery