It's great at removing creatures with hexproof or creatures with indestructible such as Ulamog, the Ceaseless Hunger
This card wont help someone bring down a powerful foe, but it does make it easier to keep a versatile handful of cards
I know, I know, it is not technically sacrificing a creature, just killing it
While many players tend to focus on the powerful abilities of their creatures and their ability to deal large sums of damage, there are some decks that aim to make use of the creature's toughness rather than their power
I hope we get to see a couple full releases - namely the excellent draft environment of Khans of Tarkir - but we don't necessarily need Magic 2014 or Magic 2015 in their entirety on Arena
So there are many Daleks, Cybermen, and yes, of course, Weeping Angels