Mana Vortex works as a general debuff, this is true as does Abolish magic.However De-buffs may only dispel buffs not effects.Skills like Battle Roar,Befuddle,Rejuvenation,Doom Roots,Cripple,Vampiric Soul,Mark Of The Warrior,Darkness,Restore Mana and Rally Cry are all Buffs and are destroyed by Vortex and Abolish.However skills such as Corrupt flesh ,Anti Magic Shield,Divine Shield,Avatar Any and all aura effects including puppet master are all Affects that cannot be purged.Even so Mana Vortex and Abolish magic are two of the most useful skills in the game not only do they both debuff they both damage summons and wards.