Exhibit 10.20(d)

NTHCYCLE,INC.

OMNIBUSAMENDMENTTONOTEANDWARRANTPURCHASEAGREEMENTAND SUBORDINATED CONVERTIBLE PROMISSORY NOTES

This Omnibus Amendment to Note and Warrant Purchase Agreement and Subordinated ConvertiblePromissoryNotes(this“Amendment”),isenteredintoasofJuly7,2026(the“EffectiveDate”), by and among Nth Cycle, Inc., a Delaware corporation (the “Company”), and the other partiessetforthonthesignaturepageshereto,comprisingtheRequiredPurchasers,andamendsand modifies each of(i)theNoteandWarrantPurchase Agreement,datedasofJune 27,2025,byand amongtheCompanyandtheindividualsand entities who became parties thereto (the “Purchasers”) (asamendedtodate,the“PurchaseAgreement”),and(ii)allSubordinatedConvertiblePromissory Notes issued under the Purchase Agreement as of the Effective Date (as amended to date, the “Notes”). All capitalized terms used but not otherwise defined herein shall have the meanings ascribed to such terms in the Purchase Agreement.

WHEREAS,pursuanttoSection8.7ofthePurchaseAgreement,thePurchaseAgreement, thetermsofeachNotemaybeamendedwiththewrittenconsentoftheCompanyandtheholders ofNotesrepresentingamajorityoftheprincipalamountthenoutstandingontheNotes(the“NoteApproval Amount”);

WHEREAS,pursuanttoSection7.5ofeachoftheNotes,theNotesmaybeamendedwith the written consent of the Company and holders of the Note Approval Amount;

WHEREAS, the Company and the undersigned Purchasers, constituting the Note Approval Amount, desire to amend the Purchase Agreement and the terms of all Notes issued thereunderto,amongotherthings,amendtheMaturityDateandprovideforadditionalconversion terms of the Notes as set forth in this Amendment; and

WHEREAS, except as expressly set forth herein, all terms, schedules and exhibits of the Purchase Agreement shall remain in full force and effect and shall not otherwise be amended.

NOW, THEREFORE, in consideration of the foregoing and the agreements set forth below, the parties, intending to be legally bound, agree as follows:

1. Amendments.

a.

Section3.1ofthePurchaseAgreementisherebyamendedandrestatedinits entirety to read as follows:

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b.

Section3.4(a)(iii)ofthePurchaseAgreementisherebyamendedandrestatedinits entirety to read as follows:

c.

The Purchase Agreement is hereby amended by adding a new Section 3.4(c) immediately following Section 3.4(b) thereof, which new section shall read as follows:

(i)

Subjecttoandconditioneduponconsummationofatransactionorseriesof relatedtransactionsbymerger,consolidation,shareexchangeorotherwise of the Company with a publicly-traded “special purpose acquisition company” or its subsidiary (collectively, a “SPAC”), immediately following the consummation of which the shares of common stock of the SPAC is listed on the Nasdaq Stock Market or the New York Stock Exchange (such transaction, a “Business Combination”), without any actiononthepartofanyholderofaNote,theCompanyoranyotherparty, immediately prior to the closing of such Business Combination, all principal and accrued but unpaid interest on each Note shall automatically convert into that number of fully paid and nonassessable shares of the Company’s Common Stock at a conversion price per share equal to the CappedPrice.Fortheavoidanceofdoubt,suchBusinessCombinationshall not constitute a Company Sale for purposes of Section 3.4(b).

(ii)

If any Note is to be automatically converted pursuant to this Section 3.4(c), written notice shall be delivered to the holder of such Note notifying such holder of the conversion to be effected, specifying the Capped Price, the principal amount of the Note to be converted, together with all accrued and unpaid interest, and the date on which such conversion is expected to occur. Each holder of a Note hereby agrees to execute and deliver to the Company

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all transaction documents entered into by all other holders of Notes and such other agreements reasonably requested by the Company in connection with a Business Combination, including (without limitation) any registration rights agreement, stockholders agreement, lock-up agreement or similar agreement. Each holder of a Note also agrees to deliver the original of such holder’s Note (or a notice to the effect that the original Note has been lost, stolen or destroyed and an agreement acceptable to the Company whereby such holder agrees to indemnify the Company for any loss incurred by it in connection with such Note) at the closing of a Business Combination for cancellation; provided, however, that upon the closing of such Business Combination, each Note shall be deemed converted and of no further force and effect, whether or not it is delivered for cancellation as set forth in this sentence. The Company shall, as soon as practicable thereafter, issue and deliver to each such holder notice of issuance of book entry shares for the number of shares of Common Stock to which such holder shall be entitled upon such conversion immediately prior to the consummation of such Business Combination.

(iii)

Any conversion of a Note pursuant to this Section 3.4(c) shall be deemed to have been made immediately prior to, but conditioned upon, the closing of the Business Combination, and on and after such date, the Person entitled to receive the shares issuable upon such conversion shall be treated for all purposes as the record holder of such shares. As used herein, “Person” shall mean any individual, sole proprietorship, partnership, limited liability company, joint venture, company, trust, unincorporated organization, association, corporation, institution, public benefit corporation, firm, joint stock company, estate, entity, or government agency.”

d.

EachNoteisherebyamendedbyaddinganewSection4.3immediatelyfollowing Section 4.2 thereof, which new section shall read as follows:

“4.3Business Combination. Upon the closing of a Business Combination, all of theprincipalandinterestonthisNoteshallautomaticallyconvertintosharesofthe Common Stock at the applicable per share price set forth in the Purchase Agreement,andthePayeeshallexecuteallnecessarydocumentsinconnectionwith such Business Combination, all as more fully described in the Purchase Agreement.”

2. Governing Law. This Amendment shall be governed by and construed in accordance with the internal law of the State of Delaware, without regard to conflict of law principles that would result in the application of any law other than the law of the State of Delaware.

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3. Counterparts. This Amendment may be executed in two or more counterparts (including PDF, or other electronic counterparts), each of which shall be deemed an original, but allofwhichtogethershallconstituteoneandthesameinstrument.Thesignaturepagesheretomay be delivered by facsimile, PDF (or any electronic signature complying with U.S. federal ESIGN Act of 2000, e.g., www.docusign.com)and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes.

4. Entire Agreement.This Amendment, together with the Purchase Agreement, the Notes and any future Notes to be issued under the Purchase Agreement, constitutes the full and entire understanding among the parties regarding the subject matter in this Amendment.

5. Limited Amendment.Other than as set forth in this Amendment, all of the terms and conditions of the Purchase Agreement and the Notes will continue in full force and effect.

(Signaturepagesfollow)

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INWITNESSWHEREOF,thepartieshaveexecutedthisOmnibusAmendmentNo.1to Note Purchase Agreement and Notes as of the Effective Date.

[SIGNATURE PAGE TO OMNIBUS AMENDMENT NO.1 TO NOTE PURCHASE AGREEMENT AND NOTES]

INWITNESSWHEREOF,thepartieshaveexecutedthisOmnibusAmendmentNo.1to Note Purchase Agreement and Notes as of the Effective Date.

[SIGNATURE PAGE TO OMNIBUS AMENDMENT NO.1 TO NOTE PURCHASE AGREEMENT AND NOTES]

INWITNESSWHEREOF,thepartieshaveexecutedthisOmnibusAmendmentNo.1to Note Purchase Agreement and Notes as of the Effective Date.

[SIGNATURE PAGE TO OMNIBUS AMENDMENT NO.1 TO NOTE PURCHASE AGREEMENT AND NOTES]

INWITNESSWHEREOF,thepartieshaveexecutedthisOmnibusAmendmentNo.1to Note Purchase Agreement and Notes as of the Effective Date.

[SIGNATURE PAGE TO OMNIBUS AMENDMENT NO.1 TO NOTE PURCHASE AGREEMENT AND NOTES]

INWITNESSWHEREOF,thepartieshaveexecutedthisOmnibusAmendmentNo.1to Note Purchase Agreement and Notes as of the Effective Date.

[SIGNATURE PAGE TO OMNIBUS AMENDMENT NO.1 TO NOTE PURCHASE AGREEMENT AND NOTES]

INWITNESSWHEREOF,thepartieshaveexecutedthisOmnibusAmendmentNo.1to Note Purchase Agreement and Notes as of the Effective Date.

[SIGNATURE PAGE TO OMNIBUS AMENDMENT NO.1 TO NOTE PURCHASE AGREEMENT AND NOTES]