Shadow Fairy

WARNING: When facing these creatures, it is vital to kill/disable them before they can hit you. With the exclusion of Evolution, who can restore herself by transforming, this creature's default attack will PERMANENTLY lower the target's Strength, with no way of regaining the lost stats.

A final evolution of a Shadow Spirit, they can be evolved from a Death Fly only if their lust genes are 5+. They can be evolved into three types, an Average Level Type that learns ShadowSpear, a Magic Level Type that learns MagicShadow, or a Seduction Level Type that learns MindControl.

The lust gene requirement is quite high and their evolution path doesn't give them the greatest skill set so some fusing might be in order, but the end result is definitely worth it. The final skill they can choose to learn are all useful and they get above average stat growth in all areas, the lowest being 1.1 (health) to 1.7 (Magic and Speed). Along with their passives, they can excel in multiple roles at once.

The easiest is a seduction role, in which you can disregard all their other skills. The combination of Reveal onSeduce and MindControl with the stats to back them up make them top-tier recruiters.

Another option is to make them into boss killers. It requires some effort to get them the skills and traits, but once they do it's impossible to deny the effect of repeated Decay on a single target.