For one black, one green, and X generic mana, when Old Stickfingers is cast, its controller mills cards from the top of their library until they've milled X creatures
A slightly clumsy card that is not playable in control decks however highly powerful and even abusable with things like Goblin Welder resulting in a very powerful card
It is a trump card for defeating monsters that cannot be defeated by force
[All Turns] When any of your other Digimon with the [Royal Base] trait would leave the battle area by effects, by placing this Digimon face up as the bottom security card, they don't leave
Lastly, as if the SIRs werent enough, a lot of OG Pokmon from the Johto and Kanto regions populate Destined Rivals card list
Ostensibly, these designs will eventually be printed on in-universe MTG cards - though no timeline on that conversion has ever been provided to players