Three power, one toughness. for three mana. Terrible. Can't be target of spells or abilities your opponent controls. Amazing!
Use Sacred Wolf as a prelude to some of your more important creatures. The only way that someone will be taking care of this card is by using valuable non-targeting spells, or forced sacrafice. And of course, whenever there's an opening, swinging in for 3 isn't bad, either.
Strategies and game play:
Try to get the olf out early, before you'll need any blockers. After that, there are two main possibilities. Either the other person will attack with what they've got, or they won't. Both are in your favor! They know you won't block with a 3/1, but then there's always the chance of you hitting them for three.
Combos with other cards:
This card is great combined with either Gigantiform or Unnatural Predation and other pump. The Gigantiform will give you a very big creature, out of range of non-targeting kill cards. Unnatural Predation with at least one other pump card can be useful when they decide they're going to have to chump block.
Ways to counteract it:
Marsh Casualties and Pyroclasm will both wipe out the Wolf. In addition, Choking Fumes can wipe it out easily. The only other thing to look out for is cards like Gatekeeper of Malakir or Dispense Justice.
This card is virtually untouchable when played write and with the right support spells.
That one toughness can be a doozy, not to mention the Sacred Wolf's downfall. An early Pyroclasm or Marsh Casualties can be a bit of a buzz kill, not to say that a single pump card wouldn't counter those with ease.
Being introduced in M11, Sacred Wolf has only one art and is available foiled and unfoiled.
Artwork and aesthetics:
The art sports off a beautifully drawn, all white wolf standing on a branch. The Wolf seems to be looking at you, and is really one of the nicest looking cards I've seen in a while.
Easily a 9 out of 10 when played with an appropriate deck. Hard to kill, and a powerful hitter. All of this wrapped up in a common card with a cheap mana cost.