Question: Who granted this American Brazilian jiu-jitsu practitioner, who founded Metamoris, a black belt?

Context paragraphs:
Mackenzie Dern: Mackenzie Lynne Dern (born March 24, 1993) is a Brazilian Jiu-Jitsu practitioner and mixed martial artist.  IBJJF ranks Mackenzie as the number one female black belt in brazilian jiu-jitsu.  She holds a black belt under her father, Wellington "Megaton" Dias who is one of the top Brazilian jiu-jitsu black belts in the world.  She is an ADCC and no gi BJJ (black belt) World Champion.

Alexandre Ribeiro: Alexandre "Xande" Ribeiro (born January 20, 1981 in Manaus-Amazonas, Brazil), is a Brazilian Jiu-Jitsu practitioner, mixed martial artist and submission wrestler.  He is a two-time World (Mundial) Black Belt Absolute (open weight) World Jiu-Jitsu Champion, five-time World (Mundial) Black Belt Heavy Weight Champion, and three-time World Black Belt Pro Division Champion.

Clark Gracie: Clark Rouson Gracie (born July 17, 1984) is an American Brazilian jiu-jitsu competitor and member of the Gracie family.  He is the grandson of Carlos Gracie, the founder and creator of Gracie Jiu-Jitsu, and first eldest son of Carley Gracie, the father of Gracie Jiu-Jitsu in the United States.  He is a 2013 Pan American black belt champion in the middleweight division, submitting his opponent in the finals with his signature omoplata, or clarkoplata, finish.  He was awarded the Submission of the year award from the World Jiu Jitsu Expo for his Pan Am 2013 final match.  One of the most active current competitors from the Gracie lineage, Clark Gracie is also a 2017 World Master black belt champion in the middleweight division.

Keenan Cornelius: Keenan Kai-James Cornelius is an American Brazilian Jiu-Jitsu practitioner known for his competitive achievements, most notably including what has been dubbed a grand slam in Brazilian Jiu-Jitsu, having won double gold medals at four major tournaments - the World Jiu-Jitsu Championship, Pan-American Championship, European Open Championship, and Brazilian National Jiu-Jitsu Championship - at his given belt rank

Ralek Gracie: Ralek Gracie ( ; born October 4, 1985) is an American Brazilian jiu-jitsu practitioner and mixed martial artist.  As the son of Rorion Gracie, he is a member of the Gracie family, and the nephew of Legends of MMA Hall of Famer Rickson Gracie and UFC Hall of Famer Royce Gracie.  He was awarded his black belt in Brazilian jiu-jitsu by his grandfather Hélio Gracie.  He is also the founder of Metamoris, a submission-only grappling promotion.

Roger Gracie: Roger Gracie Gomes (born September 26, 1981) is a Brazilian Jiu-Jitsu practitioner and mixed martial artist.  A member of the Gracie family, he is the son of Reila Gracie (daughter of Carlos Gracie) and Mauricio Motta Gomes.  Roger was awarded his black belt by his cousin Renzo Gracie at the behest of Carlos Gracie, Jr. whilst training in New York in 2003.  He is currently a third degree black belt.  Roger Gracie is the founder and head instructor at The Roger Gracie Academy located in Kensington, London, England.  Notable Black belt promotions include Raymond Stevens (judoka), Nick Gregoriades & Kywan Gracie Behring.  Roger is also an active mixed martial arts competitor and is the current ONE World Cruiserweight Champion.

Rubens Charles Maciel: Rubens Charles Maciel (born December 24, 1979), aka "Cobrinha" and sometimes referred to as Rubens "Cobrinha" Charles, is a Brazilian Jiu Jitsu (BJJ) competitor.  He is considered the best featherweight in the decade and to be among the best pound for pound jiu jitsu competitors in the world .  Cobrinha is a black belt in Brazilian jiu-jitsu under Fernando "Terere" Augusto and a member of Alliance Jiu Jitsu.  Cobrinha has won a total of six world championship titles in Brazilian jiu-jitsu as a black belt in the featherweight (or lightweight) category.  He started training BJJ in 2000, received his black belt in 2005, and has since medaled in every World Jiu-Jitsu Championship in which he has competed - a total of ten.  He is known for his attacking style of jiu jitsu and, in particular, for his guard.  His guard was voted the best Guard of the Decade by fellow World Champions.

Braulio Estima: Braulio de Oliveira Estima is a 3rd degree black belt in Brazilian Jiu-Jitsu.  He received his black belt from Carlos Gracie Jr. on January 4, 2004.  Throughout his grappling career, he has won in many Brazilian Jiu-Jitsu tournaments across the world, such as the Mundials, ADCC, Pan American Championship, and European Championship.  His long list of accomplishments has made him well respected among other Brazilian Jiu-Jitsu practitioners, such that some consider him one of the top Brazilian Jiu-Jitsu practitioners in the world.

Metamoris: Metamoris is a Brazilian jiu-jitsu promotion, founded by Ralek Gracie, that organizes events in Los Angeles, California.  Live events of Metamoris are broadcast via internet pay-per-view around the world and via premium TV at Canal Combate in Brazil.

Jonathan Torres: Jonathan Torres, also known as "JT" Torres, is a Puerto Rican American Brazilian Jiu-Jitsu practitioner.  He is known for a number of competitive accomplishments earned both prior to and following his promotion to black belt.

Supporting paragraphs: Metamoris Ralek Gracie
Answer: Hélio Gracie