Sage of the Unknowable, Darksteel Monolith, and Mystic Forge add colorless sorcery support from different angles and equal huge advantages
By playing Jim, Space Traveler when you have the RLS Legacy in hand youll have spent five ink to play a four willpower and four health character that quests for two, a four-cost location, spent three ink to move Jim, Space Traveler there, and given Jim, Space Traveler is Evasive for as long as the RLS Legacy remains on the field - thats an absolutely wild amount of value if you can set it up for turn five
Each spell churns out a 1/1 flying Drone, giving both defense in the air and a growing army over time
More recently, Wizards also released the mechanically unique The Ghoul, Gunslinger via Secret Lair
This is one of my favorite pieces, too
You can essentially bounce two lands to your hand to cast Gush for free, then Brainstorm to draw three more and put the lands on top of your deck