Ultimately, it doesnt matter whether or not the reserved list should existit does
For example, if you control Blood Scrivener and have no cards in hand and youre instructed to draw two cards, your first card draw is replaced by drawing two cards and losing 1 life, then youll draw the second card from the original instruction
Trostani, Selesnyas Voice
Building decks around these ability types requires different strategies
Usually, cards go by one of a few select levels: Common Uncommon Rare Super Rare The Super Rare category typically has the shiny foil you should be looking for, though you can take a look at the lower-righthand side of the card to make sure
I think the saving grace on Ardyn here that just might help it see some play is that you can get his ability to trigger the turn he enters the battlefield