1. Brainlessness is an instadeath caused by mind flayers and master mind flayers

2. But between commissions, they are just as likely to strike out on their own, attempting to uncover the location of another mind flayer outpost, or better yet, a sunless city.

3. Beholders, like Mind Flayers, are considered "intellectual property" of TSR Wizards of the Coast, so they aren't allowed to be used in third party D&D supplements or in Pathfinder as they were not covered under the Open Gaming License.

4. 1 Overview 2 Publication history 2.1 D&D 3rd edition 2.2 D&D 4th edition 2.3 D&D 5th edition 3 See also 4 References Aberrations are alien entities with bizarre anatomy and strange abilities.1 They are frequently connected to the Far Realm,2 and many have mental powers.3 Examples of Aberrations include aboleths, beholders, and mind flayers.4