Dragons like Dragonlord Atarka and Scourge of the Throne can greatly disrupt a game once freerolled onto the battlefield
[6] For a 360-card cube, heres a good distribution: 250 cards, with 50 for each color 50 red, 50 green, 50 black, 50 white, 50 blue 50 multicolored cards 5 each for the 10 color pairs 30 artifacts If you include a mono-brown archetype, consider doubling this number (at least) and trimming on the individual colors, since anyone can draft colorless cards
Drannith Magistrate
It's no wonder, then, that the reprint value is pretty low
For example, Cyclonic Rift is both a Game Changer and interaction, while Mystic Confluence counts as both interaction and card advantage
(To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.) Sorcery Color tag templates(None) Victimize Choose two target creature cards in your graveyard