Letter of Intent with Superior Biotechnologies Corporation, dated May 6, 2008, accepted May 26, 2008

An Asset Sale and Purchase of a major part of the Assets of Superior by RVBF. The assets are:

Technology License Agreement. Superior shall agree to sell, assign, transfer, and convey all of its right, title, and interest in and to that

certain Technology License Agreement, dated 7 July 2007, by and between Superior and Pure Energy Corporation (“Pure”), to RVBF and Tribune. RVBF shall agree to indemnify Superior from all claims from Pure or Pure’s affiliates related to the sale and assignment of the Technology License Agreement to RVBF, as part of the Transaction Agreement.

India Project Funding Agreement. Superior shall agree to sell, assign, transfer, and convey all of its right, title, and interest in and to that certain India Project Funding Agreement, dated 7 July 2007, by and between Superior and Pure, to RVBF and Tribune. RVBF shall agree to indemnify Superior from all claims from Pure or Pure’s affiliates related to the sale and assignment of the India Project Funding Agreement to RVBF, as part of the Transaction Agreement.

Website address of www.ravenbiofuels.com.

Logo and all associated artwork -

Corporate Names – Raven, Raven International Energy, and Raven Biofuels International.

Convertible Loan Note Agreement. RVBF shall agree to assume that certain Convertible Loan Note Agreement, dated 14 September 2007, by and between Superior and Tribune (the “Note”). Superior shall no longer have any obligation whatsoever to Tribune regarding the Note. Tribune shall acknowledge that all indebtedness and obligations of Superior under or in respect of the Note shall be deemed to be and shall be paid and discharged in full, and all liens on and security interests in any of Superior’s property or assets that may have been granted to Tribune shall be deemed to be automatically terminated and released.

Advisory and Private Placement Engagement Letter. The Parties shall agree to terminate that certain Advisory and Private Placement Engagement Letter, dated 8 October 2007, by and among Superior and Tribune (the “Tribune Advisory Agreement”), with none of the Parties having any further duties, responsibilities or obligations to any other party under the Tribune Advisory Agreement. Additionally, all Parties shall agree to irrevocably waive all rights and claims that such party may have or have had under the Tribune Advisory Agreement.

Transaction price: U.S. $75,000.00 (Seventy-Five Thousand U.S. Dollars and No Cents) payable to Superior upon execution of the final documents.

Mutual Release and Wavier. The Parties shall agree to release, acquit, and discharge any other party of the Transaction Agreement from any and all (i) claims and other theories of liability or recovery of whatsoever type or nature, and (ii) damages and other components of relief or recovery of whatsoever type or nature, related to: the Transaction Agreement; the Note; that certain Business Deal dated 7 December 2007, by and between RVBF and Superior (the “Business Deal”); that certain Asset Purchase and Sale Exchange Agreement dated 17 January 2008, by and between RVBF and Superior, which superseded and replaced the Business Deal; or any other agreement referenced herein.

Non-Compete. RVBF and Tribune shall agree to non-competition and confidentiality provisions for a period of three (3) years. Such provisions will prohibit RVBF OR Tribune from operating, engaging in, or investing in entities that engage in any business related to the biofuels industry in Vietnam to the fullest extent permissible by law. Such provisions will also preclude RVBF OR Tribune or entities in which their affiliates have an investment from soliciting for employment Superior’s or its affiliates’ employees during such period. It would also prohibit RVBF OR Tribune or entities in which their affiliates have an investment from soliciting the customers or suppliers of Superior or its affiliates for such period.

Legal Fees. Parties shall bear their own legal fees needed for the preparation and execution of this Letter of Intent and the final documentation.

Non-Disparagement. The Parties shall agree to indefinitely refrain from publishing any oral or written statements about any other party to the Transaction Agreement, or any of such party’s officers or employees, that are slanderous, libelous, disparaging, or defamatory.

Raven Website References. RVBF shall immediately remove upon execution of the Transaction Agreement all references to developing projects in Vietnam, or any references to Vietnam whatsoever, from the RVBF website, and shall not reference Vietnam or the development of projects in Vietnam for the duration of the three-year non-competition provision.

Conditions to Execution. Superior’s obligations to execute the Transaction Agreement will be subject to the execution and delivery of the Nick DeVito release, waiver, and redemption, more fully discussed in paragraph 3 herein.

Release. Nick DeVito shall release, acquit, and discharge Superior from any and all (i) claims and other theories of liability or recovery of whatsoever type or nature, and (ii) damages and other components of relief or recovery of whatsoever type or nature, related to all agreements, oral or written, under which Superior and Nick DeVito are parties.

Waiver. Nick DeVito shall waive any right or claim under those certain Employment Agreements, dated 1 January 2007 and 1 October 2007, by and between Nick DeVito and Superior.

Redemption. In consideration of U.S. $400.00 (Four Hundred U.S. Dollars and No Cents), all right, title, and interest in the 400 shares of Superior capital stock owned by Nick DeVito shall be transferred and assigned to Superior, with assurances that the shares have not been sold, assigned, pledged, or transferred to any third party. Additionally, Raven International Energy Corporation stock certificate No. 002, dated April 2007, shall be delivered to Superior.

Expenses. Each of the Parties shall bear their own expenses, including without limitation, any fees paid to attorneys representing a specific party.

Termination/Expiration. This Letter of Intent shall expire at the earlier of (a) June 1, 2008, except as may be extended by mutual agreement of the parties, or (b) the execution and delivery of the Transaction Agreement by all parties thereto. The binding provisions of paragraphs 4 -7 shall survive the expiration or termination of this Letter of Intent. 

Counterparts. This Letter of Intent may be executed in counterparts, each of which shall be deemed an original and all of which together shall constitute one and the same instrument.