There's a couple of dragons with on-attack trigger, but note that this isn't on-damage, it's specifically on attack
The Betas These Werewolves/Wolves aren't as good as the alphas, usually because they cost too much mana for what they do
Lotho, Corrupt Shirriff Lotho, Corrupt Shirriff can create Treasure for you during each players turn, which can give you a quick leg up in the game
You start off with some early acceleration, generate some card advantage mid-game to keep the creatures flowing, and then close it out with Craterhoof Behemoth or some other trample effect
One returning mechanic is Myriad, which creates token copies of a creature during combat
The art for this card is stunning, as the dragon-like tiger rests on floating cliffs with its horns on full display