Relentless Dispelling

Warlock Invocation
Level: Least, 2nd lv.
Components: V, S
Casting Time: 1 standard action
RangeMedium (100 ft. + 10 ft./level)
Duration: Instantaneous
Saving Throw: Yes
Spell Resistance: No

You can use the targeted version of dispel magic, as the spell. The round after you use this invocation, the target of the effect is subjected to another targeted dispel magic at the start of your turn (with no additional action required on your part).

Targeted Dispel: One object, creature, or spell is the target of the dispel magic spell. You make one dispel check (1d20 + your caster level) and compare that to the spell with highest caster level (DC = 11 + the spell's caster level). If successful, that spell ends. If not, compare the same result to the spell with the next highest caster level. Repeat this process until you have dispelled one spell affecting the target, or you have failed to dispel every spell.

(Complete Mage, Page 124)