The Nightblades, the Assassin's of The Elder Scrolls Online, and one of the 4 original classes that released with the base game. These have that rogue like gameplay so many of us love. They are also the only class that can go invisible without the outside help of potions, making them a must for those of us like like to earn a living through the Thieves Guild.
Nightblades are adventurers and opportunists with a gift for getting in and out of trouble. Relying on stealth, blades and speed, Nightblades thrive on conflict and misfortune, trusting to their luck and cunning to survive. - As the In-Game description goes.
The speed of the Nightblade is one of the selling points, while they can be very simple to play, learning to master their speed and technique will have you soaring in any role you choose.