A villain walks at speed 4, turning left or right at random when it meets a wall and every so often besides (STEER), and kills the knight at a touch: not a hit off his three but the whole life (WANDERING_MONSTER from offset 59, which also keeps his cell for the next life). Only its own object destroys it (OBJECT_FLIGHT).

While it is on the screen it hums (BLIP_BY_TURN, from offset 3): twelve pulses a turn at a pitch read from a 16-byte table by the turn count. The table was meant to be one of the four that follow the creature's (BLIP_PITCHES), one per villain, but that routine builds the address from BC alone and throws away the table's address loaded into HL here; and the offset in BC is not 0, 16, 32 or 48 but 128, 144, 160 or 176, since the graphic's bit 5 lands in bit 7, which the AND $F0 keeps (AND $30 would have been right). So the pitches come from the ROM's bytes $0080-$00BF, and the four tables are never read. Measured in the simulator: with each villain put beside the knight, the pitch was read from $00BB, $00AD, $009F and $0081 for the villains of graphics 108, 104, 100 and 96.