Intersting idea, although I like the Alpha wolf card that is in the Armory right now better.
http://elementscommunity.org/forum/level-1-crucible/alpha-wolf-alpha-wolf/The main reason is that alpha wolf synnergies better with other
cards, namely numbers.
I actually think it might not be bad to merge the two ideas somewhat. Eg. giving alpha wolf a "howl" ability which would summon its other pack members.
I think that having a literal "pack" of wolves summoned is also more thematically satisfying than converting into a larger single creature.
Even with the stat boost on the pack here I still think it is somewhat UP compared to graboid / lurker combo.
Granted, this can combo with fractals, but that would require a hefty duel element combo. Moreover, the wolf itself is so weak that such a combo would still be highly susceptible to mass CC... even more than the alpha wolf combo.
The reason for that is that the current alpha wolf combo would guarantee you to get at least one attack at full force before the opponent can retaliate, whereas this version, the 1 turn wait gives the opponent the chance to fry the threat before it ever matures.
More importantly however, while both cards provide relatively comparable offensive capabilities, alpha wolf has a wonderful synnergy with empathic bond, which makes it extremely valuable.
I think this card has some potential, but it needs some work still.