This one has an evaluated market price of $41.89 , but listings tend to be much lower
Considering you need to have no monsters and no cards in your hand, there would be no need to mark as you would have literally nothing
Flashback will probably still be the most dominant way to take advantage of Sevinne, with a much greater saturation of cards with the mechanic (plus cards that favorably interact with flashback, like Burning Vengeance or Secrets of the Dead)
Although its slightly annoying that Disney Lorcana has been so difficult to acquire and the releases have been plagued by problems and selling out nearly instantaneously, this is actually (arguably) a good thing
Instead of just looking at the price, compare your card's overall value to similar listings
28, 2024 If I have 2 or fewer security cards, can I use this card's [Start of Your Main Phase] effect to activate even if I don't place 1 [Leon Alexander] from my hand as this Digimon's bottom digivolution card