@JeremyECrawford @ChrisPerkinsDnD "within 10 feet of you" is affected area a 20ft sphere centered on one grid vertex or a 25ft cube on you?
— CK (@seekay) July 31, 2016
"Within X feet of you"—that means within X feet of your space in every direction (a spherical area). #DnD https://t.co/e3rAdZTUhl
— Jeremy Crawford (@JeremyECrawford) August 2, 2016