On an empty board this makes your hero power effectively do 7 damage. Usually I'd see this as a 6 mana 3/5 do 2 damage to enemy hero and 5 damage to a random enemy. Since the effect is pretty powerful it's a must kill and probably wont live that long unless you have a strong board... At which point it's just a win more card.
I really like the Inspire theme going on with Hunter. Wish it was actually called Inspire tho, but my brain can't make the connection between Echo and "Repeatable this turn." so I guess they made the right call on that one lmao