The genetic union of a human and a harvestman or "Daddy Longlegs". A good general-purpose mutant, the Ambler is swift and moderately powerful, able to regenerate quickly and armed with a chemical secretion that other arthropod-based monsters refuse to cross. Its preferred food is carrion and rotting vegetation, but it can be a crafty killer when the need arises. It runs in a twirling motion, and swings its clawed body like a wrecking ball into enemies.

It is mesmerized by tap-dancing.