The additional scry effect subtly informs your strategic choices, making it a card that indirectly serves the purpose of both ramp and card draw
If you are on the play, you can play around Force of Negation and Daze by casting Entomb on your opponents upkeep before they have had a chance to play a land
I tried to get more information when I saw that pop up on Facebook but I had no luck
Just look at the stats: 9/7, haste, lifelink, and indestructible
Though, Sorin, the character, is a Vampire in addition to being a Planeswalker, so I guess I didn't really color too far outside the lines here
The raw power and catch-all utility of its effect is easier to recur when attached to a cheap-ish creature, producing such huge results that non-white archetypes are trying to actively fit white mana into their decks to play it