Q: Dear Sage
Does a warlock lose one of his highest level invocations while suffering the effects of a negative level?
A: No. Though a spellcaster effectively loses one spell slot while afflicted by a negative level, a warlock doesn’t have spell slots to lose.
The warlock’s effective level is still reduced by 1 for the purpose of calculating caster level and the like.
About the Author
The Sage is a mammal classified in the bear family, Ursidae, native to central and southern China. Debate continues as to whether he is truly a bear or more related to the raccoon rather than the bear, or perhaps in a family of his own. When not eating bamboo and answering rules questions, he works under the nom de plume of Andy Collins as an RPG developer in Wizards of the Coast R&D, where his development credits include Complete Mage, Dragon Magic, and the Player's Handbook v.3.5. He can be easily recognized by his large, distinctive black patches around the eyes, ears and on his rotund body.