Black for Common, Silver for Uncommon, Gold for Rare, and Red-Orange for Mythic Rare
Mythic rare cards have orange expansion symbols
More players would prefer an efficient end to their games to a slow death at the hands of a Young Pyromancers Elemental tokens
Marvel, Elastic Ally Nakia, Wakandan Operative Okoye, Mighty and Adored Pet Avengers Power Pack Reptil, Dinomorpher Scarlet Spider, Ben Reilly Scions of the Ur-Spider Shang-Chi, Martial Mentor Shang-Chi, Master of Kung Fu She-Hulk, Attorney-at-Law She-Hulk, Jade Defender Shuri, the Black Panther Silk, Web Weaver Spider-Girl, Legacy Hero Spider-Ham, Peter Porker Spider-Man India Spider-Man, Brooklyn Visionary Spider-Man, Miles Morales Spider-Man, To the Rescue Spider-Rex, Daring Dino Spiders-Man, Heroic Horde Stature, Young Avenger Storm, Force of Nature Storm, Queen of Wakanda Storm, Shaker of Skies Storm, Windrider Surris, Silk-Tech Vanguard T'Chaka, Venerable King T'Challa, the Black Panther Tarantusk, Unwisely Awoken The Astonishing Ant-Man The Clutter Cluster
The fastest way is to look at the expansion symbol on the right side of the type line
Adding in the +1/+1 counter dynamic when discarding nonlands makes for even more interesting decision space