From the back of the package:
A mighty Overlord treading the path of legend needs strong leaders to oversee his many minions.
Bring your Road to Legend Lieutenant tokens alive with 3D minis!
Gata the White Dead is as whisper-silent and deadly as a knife in the dark. He is the personal assassin of the Beastman Lord, a solitary figure moving through the night and ending the lives of all who dare oppose his master.
Avatar: Beastman Lord only.
Minions: no minions.
He may only be played at the Silver level of the campaign or higher. When he is encountered, roll one black die. On any result except a blank, the heroes are ambushed. He has the Shadowcloak ability and if he deals at least 1 damage to a hero (after applying armor), roll a black power die. If you roll a blank, the hero is instantly killed, regardless of wounds or armor.