POWER OF ATTORNEY

February 22, 2021

Know all by these presents, that the undersigned hereby makes, constitutes and
appoints Theo Epstein and John Vedro signing singly, as the undersigned's true
and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:

(1)  prepare, execute, acknowledge, deliver and file Forms 3, 4, and 5
     (including any amendments thereto) with respect to the securities of Arctos
     NorthStar Acquisition Corp., a Cayman Islands exempted corporation, or any
     successor thereto (the "Company"), with the U.S. Securities and Exchange
     Commission, any national securities exchanges and the Company, as
     considered necessary or advisable under Section 16(a) of the Securities
     Exchange Act of 1934 and the rules and regulations promulgated thereunder,
     as amended from time to time (the "Exchange Act");

(2)  seek or obtain, as the undersigned's representative and on the
     undersigned's behalf, information of transactions in the Company's
     securities from any third party, including brokers, employee benefit plan
     administrators and trustees, and the undersigned hereby authorizes any such
     person to release any such information to the undersigned and approves and
     ratifies any such release of information; and

(3)  perform any and all other acts which in the discretion of such attorney-in-
     fact is necessary or desirable for and on behalf of the undersigned in
     connection with the foregoing.

The undersigned acknowledges that:

(1)  this Power of Attorney authorizes, but does not require, such attorney-in-
     fact to act in his discretion on information provided to such attorney-in-
     fact without independent verification of such information;

(2)  any documents prepared and/or executed by such attorney-in-fact on behalf
     of the undersigned pursuant to this Power of Attorney will be in such form
     and will contain such information and disclosure as such attorney-in-fact,
     in his or her discretion, deems necessary or desirable;

(3)  neither the Company nor such attorney-in-fact assumes (i) any liability for
     the undersigned's responsibility to comply with the requirements of the
     Exchange Act, (ii) any liability of the undersigned for any failure to
     comply with such requirements, or (iii) any obligation or liability of the
     undersigned for profit disgorgement under Section 16(b) of the Exchange
     Act; and

(4)  this Power of Attorney does not relieve the undersigned from responsibility
     for compliance with the undersigned's obligations under the Exchange Act,
     including without limitation the reporting requirements under Section 16 of
     the Exchange Act.

The undersigned hereby gives and grants the foregoing attorney-in-fact full
power and authority to do and perform all and every act and thing whatsoever
requisite, necessary or appropriate to be done in connection with any of the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, hereby ratifying all that such attorney-in-fact of, for
and on behalf of the undersigned, shall lawfully do or cause to be done by
virtue of this Power of Attorney.

This Power of Attorney shall remain in full force and effect until revoked by
the undersigned in a signed writing delivered to such attorney-in-fact.

                                   * * * * *


IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 22nd day of February 2021.


                                                  By: /s/ Jared Smith
                                                      ---------------
                                                  Name: Jared Smith
                                                  Title: Director