You can try and play a control game with weapons, secrets and defensive tools and then on turn 8 you can summon 14/20 on your Unseal the Vault using this card and Revenge of the Wild.
Many think it is slow for Hunter which might be true, but if anything Unleash the Beast sees a lot of play, this just has a different application in a different deck, like you don't run this in a Zul'jin deck.
A bit overcosted too me, of course if you "calculate" the number of minions by the effect it will not sound overcosted, but you cannot forget this is a hunter card.
It would be perfect at 5 mana.
Overcosted and "not cheap enough for hunter" are not the same thing. This card is in fact undercosted.
It's is. It's math it can't be changed. This card is worth exactly 7 Mana. Formula for minion stats is (Attack+Health-1)/2=Mana spend on stats. Note that 0.5 Values can be rounded either down (Upgradeable Framebot) or down (Am'gam Rager).
1/1 is worth 0.5 Mana
Rush's value varies but on "good" cards it is worth 0.5 Mana (Average is 0.9 I think).
Therefore this card is strong at 6 Mana and overall quite good....
Edit : While writing this I confused myself it's fixed now
While it won't be meta, I look forward to hitting somebody with Swarm of Locusts + Revenge of the Wild after playing a Scavenging Hyena. !0-mana to deal 12 damage to enemy minions and summon a 26/14 would be hilarious against decks that don't run targeted removal.