Dragon's Hoard
Black and green are still able to do it, but do it very infrequently
Much more recently, Wizards created cycling lands that tapped for more than one color of mana
Soul Warden and friends is ubiquitous at the kitchen table, and there is a deck archetype named after them - "Soul Sisters." Gaining a life each time a dork arrives at the battlefield is incredibly good, and it's even better in 20 life formats like Five Color than it is in the 40 life Commander, but don't sleep on it there either
#5: Best Colorless Cards Invent Superiority: Blinkmoth Urn, Nevinyrral's Disk, Skullclamp, Shimmer Myr, Armory Automaton, Solemn Simulacrum, Soul of New Phyrexia, Commander's Sphere, Sol Ring
Sapphire has two key cards that act as payoffs for your extra ink: Belle, Strange but Special and Hades, Infernal Schemer