I am surprised that this card has no reviews yet!
For me, it's an auto-include in any Aggression Thor deck. Thor becomes Aerial thanks to Mjolnir and loves to use it to take a Mean Swing or a Skilled Strike against the bad guys, so this card is basically a much better Jarnbjorn with improved resource efficiency (damage/ER ratio of 2, on par with Hand Cannon), AND you can play it for free with Team-Building Exercise since it shares the Aerial trait with you (EDIT: most likely you can't do this, see discussion below).
If you happen to have Mean Swing, Skilled Strike and Pitchback in your hand, you can turn a basic attack into a 12-damage wallop for only 4 ER, which is amazing value! 3 copies of each of those cards are enough to defeat both stages of most villains in the game when playing Solo.
Of course it's good for other Aerial heroes who attack a lot, like Nova (it's in his pre-built deck for a good reason) and Spectrum, and obviously super good for Aggression Angel who draws a card after playing it, slightly less so for Aggression Ironheart who doesn't attack as often. Grab it together with Dive Bomb and you'll have a solid backbone for any Aggression deck based on those heroes.