For Gruul mana-fixing, I recommend prioritizing dual lands that count as both Forests and Mountains: Cinder Glade, Stomping Ground, Sheltered Thicket, and Taiga (if you're willing to spend lots of money) add layers of extra synergy to the deck because they can be fetched by lands (Wooded Foothills) and spells (Wood Elves) while also empowering cards that care about land types like Valakut, the Molten Pinnacle and Howl of the Night Pack
Sad Robot ( Solemn Simulacrum ) is one of the best known artifact creatures to offer a draw ability
Its nice that the adventure side represents common themes found in those colors, so sac decks will like the black one, while spellslinger decks will play the red one, and so on
Light: Light, especially direct and indirect sunlight will not only damage and discolor your cards, but sunlight will also break down the plastics in your binder pages and sleeves
To its detriment it's a sorcery, which places it further down this list than another draw X cards blue card-drawing card