Here, presented in order of likely upside, are my picks for the cards in Magic Origins most likely to reward timely speculation, with all target prices assumed to be possible during 2015 unless otherwise noted: 1
Whenever enchanted player casts a spell with the chosen name, you may sacrifice this Aura
Mana value (sometimes referred to on older cards as converted mana cost) is never concerned with which specific colors of mana are included in the cards actual printed cost each colored pip just counts as 1 value
The over-number Secret Rare status is a genuine talking point for collectors and a wonderful piece of TCG trivia
The only argument I can possibly dig up are these print test cards
This card prevents your opponents from swinging out at you with a board full of creatures, and forces combat to be one-on-one, both of which favor you