Fewer options really hurts, but the two-color partners are consistently good, and Joel draws you cards whether you sacrifice your own token, or an opponent chump blocks with a creature token, on any player's turn
Toss in effects like Silent Arbiter to stop your opponents from ever blocking
3 Merfolk When it comes to tribal decks, Merfolk has stood the test of time
Boy was I surprised
That'd be great on its own, but Ancient Cellarspawn also causes an opponent to lose life equal to the difference between the mana you spent and the mana you should have spent without all the discounts
You can also make people cry when they play Delver, Noble Hierarch, Ice-Fang, Brazen Borrower and much, much more