Template:Unleash the Hounds strategy
Unleash the Hounds is one of the simplest and most devastating combo cards available to the hunter. It also synergies with several key hunter cards, and can serve a number of different purposes, from card draw to removal to directly defeating the opponent through burst damage. Its low cost allows it to be played alongside several other cards to make these powerful combinations, especially in later rounds.
The Hounds summoned by Unleash the Hounds are useful, but weak. Other Beast cards such as 
Timber Wolf and Dire Wolf Alpha are the perfect remedy for this. They can transform these 1/1s into something far more powerful. Other options such as Raid Leader can also be useful, but Beasts are generally preferable to due to synergy with other Hunter cards.
Because Unleash the Hounds summons one Hound for each enemy minion on the board, it is most powerful when the opponent has a large number of minions in play. Under the right conditions, these weaker Beasts can be used to trade for far more powerful minions, allowing the hunter to turn the game around and reclaim the board. Excellent cards to combine with the Hounds include Hunter's Mark and Kill Command, to easily remove any threats from the battlefield.
Another great combination with Unleash the Hounds is Scavenging Hyena, which could gain up to +12/+6 from the Hounds when Unleash is played while the enemy has 6 or 7 minions, whereas 7 minions at one time is the maximum a player can have on the battlefield.
Combining Unleash the Hounds with Starving Buzzard will cause the hunter to draw a card for each Hound summoned, and with Cult Master for each Hound that died. Unleash the Hounds potentially offers one of the cheapest and most card-efficient trigger for Starving Buzzard and Cult Master, drawing up to 6 cards for 3 mana.
Other good combinations include 
King of Beasts, 
Infest and 
Acidmaw, where the latter can be played at 10 mana to efficiently destroy all enemy minions on the battlefield.
Be aware that the Hounds summoned by Unleash the Hounds will be limited by the 7-minion limit, and plan accordingly. If the opponent has more minions than the hunter has room for Hounds, some of the summons will be wasted. Also note that several copies of Unleash the Hounds can be played in the same turn, which allows summoning more Hounds in total than the amount of minions the opponent has. For instance, two copies of Unleash the Hounds will summon 6 Hounds in total if your opponent has 3 minions. If your opponent has more than 3 minions, the best is to trade the Hounds from the first Unleash the Hounds before casting another copy, to maximise the amount of Hounds you can get due to the 7-minion limit.
Note that because Unleash the Hounds is a summon spell and not a direct minion summon, the Hounds themselves cannot be placed, and will always appear to the far-right of the player's board. This can make it disadvantageous to play cards such as Dire Wolf Alpha before summoning the Hounds.
Counters
The main counters to Unleash the Hounds are Taunt minions and AoE damage. The former can be used to force the Hounds to trade into a single powerful target, and this is usually the only option available to prevent the Hounds from overrunning the player entirely. Making sure to have a Taunt on the board as the game approaches the mid- to late-game is the main defence against this assault.
The second counter is the more efficient and cheaper. Think of cards like Fan of Knives and Twilight Flamecaller. The optimum counter is Counterspell, which can also prevent other powerful Hunter spell cards like Call of the Wild.
Another way of countering Unleash the Hounds is to limit the number of friendly minions on the board. Every friendly minion is one additional Hound for the opponent. Limiting minion numbers to two or three can prevent the hunter from making good use of the card.
Any combo cards set-up in advance, such as a lone Timber Wolf, should of course be removed immediately, as these can allow the combo to build to even greater proportions.
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