Assassin

"Deceptive and cunning, Umbral Assassins are notorious for their expertise at using stealth and misdirection to their advantage"
 * Unarmored
 * Throws smoke bombs at Towers, reducing their Range
 * Counter with Infantry Towers to pull him out of stealth

- Eris of the Sky Isles

Special at sabotage player's defense, though their health aren't high, these Assassins can use the smoke bombs at your tower which can reduce range of the Tower, which can be annoying, most Tower are nearly disabled and some long-range one will be lose that advantage greatly. In addition, they also come with stealth which can't be attacked by most tower when unblocked (Area attack still can hit and damage them even though they aren't blocked).