I prefer Master of the Pack, although it could use a change of artwork. Also, 7 mana is way too much. I'd make it a 3/5 for 5 mana.
I did consider such a low amount of mana, but for that kind of mana it would just be a good minion in most hunter decks, because summoning 2 additional 1 drops is quite powerful and it would allow for more agressive hunters since your 1 drops get a bunch of lategame value. If it were to be a 5 mana 3/5, you could drop it on turn 6 with a 1/1 for a 6 mana 5/8, which I think is too many stats for something that would enable agressive play.