The following spell merchants are purveyors of one or more spells consisting of a Drain Skill effect: * This person's services are available to faction members of a sufficient rank only. Or was that only with Morrowind? Refer to individual articles for detailed information.
The first exception was a few cheap, worthless spells I made in several different schools for the purposes of skill grinding. Morrowind drain skill trick effects entirely (replacing them with Damage ), make Fortify & Absorb effects permanent, change all of them so that their Magnitude was how far from 0 (for fortification) or 100 (for damage) they set the target skill to, & ramp up the casting costs significantly.