Lets start with a look at the lands, because theres really no reason that you should be running more than a handful of lands that dont already come with a non-basic land type
Lotus Petal, originally printed as a lowly common (!) back in 1997s Tempest set, the card has become a combo piece across a variety of formats where its legal, of course and the card retains an impressive price point no matter what printing is sought
But what makes these cards so special and valuable
[All Turns][Once Per Turn] When an opponent's Digimon digivolves or an effect adds cards to the digivolution cards of an opponent's Digimon, by trashing 1 card in this Digimon's digivolution cards, trash the top card of your opponent's security stack
According to CGC, the last one, which is printed on a plain backing and not the usual MTG or Pokmon designs, was actually a press asset used to show off the card game for a now-lost interview
As a general rule of thumb, we tend to avoid allowing players to force land discard on anything that can be played during the first few turns