Lucid Dreaming

You are able to dream lucidal.

Lucid Dreaming You are proficient in the Ability of Lucid Dreaming (Intelligence Modifier)

Power Napping Every time you take a nap (at least 30 minutes) you can determine a subject to concentrate on.
If you succeed a Lucid Dreaming Ability Check you gain Advantage on the first Intelligence Ability Check in relation to the choosen subject.
(The DC is determinded by the DM on basis of Nap Duration and likelihood to know things about said subject)

Illuminating Dreams Every time you take a long rest you can determine a subject to concentrate on.
You have Advantage on Intelligence Ability Checks in relation to the choosen subject until you take another nap or long rest.
You need 9 hours instead of 8 to gain the effects of a long rest.

Sleep Dependent If you haven't taken a nap in the last 8 hours, you gain a level of exhaustion. Increases one level every additional 4 hours without a nap.

***NOTE*** This Feat is not intended to be a Feat, that you take at Level Ups, but as a character tradeoff.