Big Game Hunter art by Carl Critchlow
Note that this Human Assassin (also a Rebel, tutorable with cards like Amrou Scout!) has an effect that mimics Reprisal-a spell originally from Alliances that destroys a creature with power 4 or greater without possibility of regeneration.
Dragons are apparently commonly in need of reprisal. Note that the Seventh Edition printing of Reprisal also depicts a dragon getting (or rather, having just gotten) the axe.