Its a lot less coherent than Magic: The Gatherings mana colours, but it works as intended: constructing your deck around one or two colours will certainly develop some kind of theme
For decks incorporating white, consider Adamant Will for a quick boost and indestructibility or Soul of New Phyrexia for its broader protective abilities
If the target creature dies that turn, Searing Blood will deal 3 damage to whoever controls the creature when it dies, who isn't necessarily the player who controlled it when Searing Blood resolved
Shallow Grave Shallow Grave allows you to get a creature from your grave into play with haste until the end of your turn
Look for a "buylist" to see how much the company will pay to buy your cards
And, even after a litany of announcements at PAX East this year, there's still more to look forward to with this set