A multicolored card should take aspects of both colors and put them together or take an area of overlap between colors and enhance it
Conspicuous Snoop Courser of Kruphix Crown of Convergence Future Sight Garruk's Horde Goblin Spy Magus of the Future Melek, Izzet Paragon Mul Daya Channelers Oracle of Mul Daya Skill Borrower Temporal Aperture Vampire Nocturnus Vampire Nocturnus Avatar
They can only take one or two hits each and aren't very good for attacking (or 'Challenging') your opponent's cards, but they cost a mere one Ink to deploy, meaning you can drop them on turn one
A lot of players in local groups were selling a bunch of their pulls, so I was able to start a rudimentary collection after a few nice purchases
Prospective players also have to watch out for Abzan Greasefang, which involves using the titular card to reanimate powerful vehicles like Parhellion II each turn, and Mono Green Ramp, which uses Nykthos, Shrine to Nyx to power big mana turns