From a reprint value perspective, Preordain is worth roughly 40 cents in its cheapest, non-foil form according to TCGplayer market price
Cards would have to be very strategically released to help enhance existing strategies rather than what is typically done where half-fleshed out strategies are released into the game with little follow through on supporting mechanics
The premise is this: you are a powerful wizard, called a planeswalker, who summons creatures, spells, and weapons to aid you in your destruction of other planeswalkers
Let's take a look at the big ones, likely to be the cards you hope to open the most at your LGS's next Limited event
Already you may want to go with cards with expensive equip costs like Colossus Hammer
Siona, Captain of the Pyleas is another choice at the top end of our shallow mana curve, but she provides a lot of value in retrieving a choice aura and then giving us fodder to sacrifice to our opponents, such as Doom Foretold