This Hunter buff spell will work especially well with low-cost beasts. You can cast it on all the cheap beasts with Rush, Charge, or Echo that will come back buffed once again. Beasts with Lifesteal are another great option, which may finally fulfill the lack of proper healing within the class.
Also, consider playing it with Rexxar the Deathknight. His Zombeasts can be really powerful and cheap, and now you can also put three copies of these unique cards in your deck.
It's definitely a great tool for all Beast Hunter players!