best starter deck pokemon trading card game gameboy for Game Boy Official Nintendo Player's Guide from Nintendo Power: Nintendo Power: 0045496691790 Books Start Deck 100 Battle Collection

I believe that we can glean a hint of the answer in Mark Rosewater's latest State of Design article, from July this year

It's an answer to answers - commonly run in decks to answer removal that's targeted like Swords to Plowshares or Beast Within or mass like Blasphemous Act or Damnation

So I googled them to find out the answer

(They each put the top card of their library into their graveyard.) Legendary Creature - Human Knight Drain (CTRL to add secondary) Draw Braids, Arisen Nightmare At the beginning of your end step, you may sacrifice an artifact, creature, enchantment, land, or planeswalker

Set Boosters also drop an art card, and in Dominaria United Set Boosters, signed art cards appear twice as often as in previous standard-legal Set Boosters

And if somebody exiles your graveyard, descended just shrugs and says, Who the cave cares? Descend X cares about the total number of permanent cards in your graveyard