@JeremyECrawford
What happens after 20th level?
Is there a cap to character levels?
— The Delivery Guy (@Del_Guy) January 4, 2016
The highest level is 20th. See the "Epic Boons" section in the DMG (p. 231) for ideas on further advancement. #DnD https://t.co/F5vGTtsHac
— Jeremy Crawford (@JeremyECrawford) January 5, 2016