Preordain and Faithless Looting are a way to sculpt your hand
I am 99% sure that Phyrexia is going to invade Kaladesh, with it either happening in the next set, or very clearly setting up the invasion for our return to Kaladesh the next time around
You get more card advantage the more vampires youve got under your control, but you also take a hit to your life in exchange
While Sram, Senior Edificer is also good draw, its only off of cast, and so should always be second choice to Puresteel
Great in all format, and even better in Commander, where your opponent gaining 7 life isn't that big of a deal
To put in more specific terms, Im 1/80 to get a Borderless Wrenn and Six of any type, but Im 1/160 to get either a Textured foil or a Borderless