Adventure Time Season 10 Episode 3 - Son of Rap BeaR Episode Title:Son of Rap BeaR.Episode Description:At a party, Flame Princess accidentally signs a contract with Toronto to forfeit her kingdom to him if she loses a rap battle with Son of Rap Bear (voiced by Dumbfoundead). She and Finn meet Rap Bear (voiced by Rekstizzy), who says that his son blew his legs off; this frightens them. Flame Princess feels ill-prepared despite her training and visits her father, the deposed Flame King (voiced by Keith David). Although she tries to mend their rocky relationship, she is frustrated by her father's apparent oblivion to the pain he caused her. Flame Princess begins to lose her composure at the rap battle, but expresses her anger when she sees the still-unapologetic Flame King in the crowd. Her rap impresses the crowd, and she defeats Son of Rap Bear.