1. Artisan of Forms: It will require another spell to trigger the copy ability, but it is only a two-drop.
2. Polis Crusher: It has green, which makes it easy to ramp to make it monstrous.
3. Rageblood Shaman: I am surprised a Minotaur lord is not a hot commodity. My goal is to make a fun minotaur tribal deck sans Boros Reckoner (way too much money!) This could be a fun Modern build.
4. Triad of Fates: It is legendary, and that's a drawback, but its only a four drop, and I can use it as a poor man's Restoration Angel or for card draw advantage.
5. Tymaret, the Murder King: It is legendary, and that's a drawback. I will need lots of 1/1 tokens to sacrifice to it. It looks like a fun Modern build.
October 12, 2013: for $3 added a few more junk rares.
8. Arbor Colossus
10. Prosnotic Sphinx
11. Prophet of Kruphix
12. Steam Augury
Here is all of them.
In the spirit of experimentation I also tried a minotaur deck minus Boros Reckoner and it is a fail in fun or game winning.