The Soul Harvester is a warlock scythe that gives a bonus to stamina, spell hit rating, and spell power.
This weapon will not display some enchant glows. According to an authoritative source (GM) it is because it already has a 'glow', the steely shine of the blade. Most +dmg glows do appear, as do beastslayer. however Unholy does not. And neither does the firestone effect.