Riot Games are adding Kai'Sa to Teamfight Tactics in the next patch. The champion is a rather odd one, will fit in several team compositions and she will be a rather jumpy but also ranged tier five unit on the board.
Kai'Sa is one of the most popular champions in League of Legends at the moment and it seems like this popularity has spilt into Teamfight Tactics as well. Riot Games are adding her in a future patch and she will make an extremely powerful carry while also being absolutely unique.
The first quirk she has is the multi-class nature. She is the first Ranger that is also an Assassin. This could technically be done earlier as well, provided someone stuck a Yoummu's Ghostblade on any other ranger but that deal was neither optimal nor suggested.
Anyway, she will obviously open doors to new builds such as a mix of Rangers and Assassins in late game and sticking Ghostblade on another Ranger could actually be beneficial now.
Another unique trait she has is the pairing of her classes with the origin - Void. Let that sink in for a moment. Kai'Sa will be able to get a massive attack speed boost when there are other Rangers in the team, increased critical chance and damage with other Assassins and true damage when there are Void units on the board.
A composition with Kha'Zix, Cho'Gath, Kai'Sa, Rek'Sai and four other Assassins, one of them being a Yoummu's Ranger, would mean there are eight units on the board, which is not too much to expect from a game. In this scenario, she would deal true damage, have 30 per cent chance to get double attack speed on top of boasting the highest base attack speed in the game.
In case you thought she could use some more attack speed, Kai'Sa's ability will make her dash to the furthest target and gain a shield along with a burst of attack speed.
To compensate, Riot gave her and are changing the way Void bonus works. Now it will act similarly to that of Imperials - when two units are on the board, one of them randomly gets the true damage buff while having four will provide it for all of them.