One of the preliminary pieces of information we have on Born of the Gods, thanks to MTGSalvation.com Rumor Mill poster Ceth, is that the new keyword mechanic that is to debut in the set has to do with enchantments. As the only explicitly-enchantment-related keyword in Theros, which was supposed to have kicked off the first "enchantment block" since Urza's Saga, was bestow, the new mechanic probably won't have much to do with Auras - but other than that, it seems to be open-ended. So what might we be looking at? I'll rank the possibilities from most to least likely:
- Offering-style. Since enchantments in Theros are the creations of the gods themselves, we should be seeing something more impressive than the relatively trivial enchantment creatures with bestow and the par-for-the-course legendary gods - perhaps hugely strong and expensive global enchantments that can have their costs reduced by sacrificing other enchantments, representing the culmination of long-term divine machinations.
- Tutoring. Trading individual enchantments in hand for others in the library would certainly make it much easier to play an enchantment-based deck, especially at the competitive level - but Mark Rosewater has stated that mechanics like transmute and transfigure make decks simply too consistent and cause stale game states.
- Affinity for enchantments. While affinity has been proven to not be broken on its own - affinity for artifacts in Mirrodin block was only overpowered alongside things like artifact lands - and stands a chance to return someday, in Theros, it'd get unflattering Mirrodin comparisons.