Right...10z, not 5z. Instead, Niles double-moves to 5n 15e. He's just going to stay put, readying actions to dominate this thing if it comes into view in the fog.
A ghostly figure enters the arena, dark, blashemous symbols circling it's head. Without a sound, it glides to 10n 0e and reaches for the big bee.
['step' to 10n0e and begin a hopefully one-sided battle. It will just chase and grab]
The quell touches the advespa and deals 1 point of damage. It has 29 hp left.
Round 333:
The advespa turns to the north and touches the quell with a glowing blue claw! The quell takes no damage and resists the urge to run. (Rolled natural 20 Will save)