The Gate of the Feral Gods

Surviving a deadly dungeon that doubles as the galaxy's top game show has taught Carl and Princess Donut to expect the unexpected. This floor: a floating fortress of warrior gnomes, a sand castle, a derelict sub of rogue machines, and a trap-ridden crypt. One bubble. Four castles. Fifteen days to capture them all and unlock the stairwell. They'll need help - but can their shaky allies be trusted?