Kurzad Deepheart is a Void rare from the Dwarves faction. Kurzad was added to Raid Shadow Legends during the festive fusion of December 2020 and one of the Rares required to fuse Pyxniel. Kurzad is the first champion to have a team buff ability that increases the teams accuracy! He is also the only Dwarf with an AOE decrease defence ability (although it is the weaker version). These two abilities will bring a lot of players genuine utility and support when trying to clear Dwarves Faction Wars. His decrease speed A1 also offfers good value in Spider, Fire Knight and Ice Golem.
I would not invest books into Kurzad unless you have them to spare, they will not dramatically change his performance.