Cards are very easy to get too, and you can obtain them as rewards for Duels, Solo games (which prominently display rewards for clearing them the first time), and Crafting
As for the dragon itself, though expensive, deathtouch and high toughness go a long way in being extra relevant late game, and exiling key pieces from a graveyard gets more and more important will every color getting more and more access to recursion these days

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And it works on each opponent and scales up in multiplayer
Expanded, on the other hand, goes back a few years even further, allowing more cards to be used