Imitate Spellcasting (3.5e Invocation)

This invocation replicate the effect of any level 0 or 1st level spell on the sorcerer/wizard list with the following change: Only one effect from Imitate Spellcasting may be up for a time, thus if a warlock is under the effect of disguise self she cannot use a silent image. No matter the spell imitated this invocation can be dismissed.