Reconnaissance Mission/Bident of Thassa/The Indomitable/Coastal Piracy - I personally run 3 of these effects
Artifact Color tag templates(None) Navigation Orb , , Sacrifice this artifact: Search your library for up to two basic land cards and/or Gate cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle
But tons of folks broke it from formats and cards as exotic as Illusionary Mask in Vintage, to contemporary stuff like Pandemonium in Standard
The Autobots mostly fall into Jeskai colors, while the Decepticons are mostly Mardu, with Optimus and Megatron naturally set up to lead Commander decks full of their subordinates
Keep in mind that you cant tap a dual for both types of mana at once
Sliver Queen, Rare As the first five color legendary creature as well as the first five-color card, Sliver Queen was unique