Assassins?

[Zhuangzi]

There should be a supply of them when you first reach Verona. In one of the shops where you start off. My general impression of the Assassin is that they seem good at first (especially their special teleport attack) but they are too weak to use as a tank and I tended to lose too many of them as they were a melee unit. Others may have found more of a use for them, but I think Royal Snakes are a better unit overall.