The Oblex, one of the new monsters featured in Mordenkainen's Tome of Foes, is a creation of Make-A-Wish recipient Nolan Whale.
Jeremy Crawford describes the Oblex; "While oozes are typically mindless blobs that slowly slink around dungeons and consume mindless prey, the oblex can absorb the thoughts and memories of a person they attack. When an elder Oblex consumes enough memories, it creates Oblex Spawn...which are essentially the excess memories of the victims an Oblex can no longer absorb." The Oblex are the result of experiments by the Mind Flayers.
Whale's character, a mohawked and tattooed dwarf, appears as one of the pieces of art in the book. Comicbook.com reported this information.
You can learn more about the Oblex and Whale's contributions to Modenkainen's here:
Jeremy Crawford describes the Oblex; "While oozes are typically mindless blobs that slowly slink around dungeons and consume mindless prey, the oblex can absorb the thoughts and memories of a person they attack. When an elder Oblex consumes enough memories, it creates Oblex Spawn...which are essentially the excess memories of the victims an Oblex can no longer absorb." The Oblex are the result of experiments by the Mind Flayers.
Whale's character, a mohawked and tattooed dwarf, appears as one of the pieces of art in the book. Comicbook.com reported this information.
You can learn more about the Oblex and Whale's contributions to Modenkainen's here:
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