He doesn't just give your Wolves +1/+1, he also gives your Werewolves +1/+1, which includes all the non-transformed Humans you might have on board
Looking at the 1994 World Championship top 4, we see that the new set had an immediate impact on a format in which the power 9 were legal In total, 9 cards from the set made an appearance in the top 4
in saying that, though, there is a subtle control element to this card
This card commands significant value, starting at $85 for heavily played (HP) copies, with moderately played (MP) surging to about $175, followed by lightly played (LP) at about $200
In Commander, you'll be able to make good use of Final Showdown, paying six to destroy all creatures, one more when there's something important you want to protect, and one more when you want to get rid of some pesky indestructible stuff too
This provides a neat ability to dig through your deck in the early game, even though it doesnt provide any real card advantage