The Yu-Gi-Oh TCG and Master Duel community is mourning the passing of Alex Cimo, widely known online as Cimoooooooo, who died on June 3, 2026, after a long and courageous battle with stage IV colon cancer. His passing was later reported online following a now-deleted statement attributed to his mother, who praised his “passion and positivity” as well as his charitable efforts supporting the Crohn’s and Colitis Foundation.
Alex Cimo was one of the most recognizable and influential content creators in the Yu-Gi-Oh space, known for his engaging videos, educational gameplay content, and long-running “Masochist” Master Duel series, which spanned over 100 episodes. His content became especially popular during the rise of Yu-Gi-Oh: Master Duel in early 2022, when many new fans discovered his channel and followed his unique approach to the game.
Cimo had been open with his audience about his health struggles, frequently sharing updates about his cancer treatment. His final health update, posted on December 31, 2025, was titled “Hope,” reflecting both his resilience and optimism during his ongoing battle. His last uploaded video was released on March 20, 2026, marking the final entry in his long-running series before his passing.
Following the news of his death, several fellow Yu-Gi-Oh content creators, including Farfa, MBT, and Ruxin34, shared tributes honoring his legacy and influence within the community. Their messages highlighted not only his impact on content creation but also his kindness, mentorship, and lasting friendships.
In a tribute video, MBT reflected on his close relationship with Alex, describing him as both a mentor and a lifelong friend. He credited Cimo with helping shape his career and expressed deep gratitude for their years of friendship and collaboration, emphasizing the profound personal and professional impact Alex had on his life.
Fans across the Yu-Gi-Oh community have also continued to share memories, clips, and messages of appreciation, remembering Alex Cimo not only for his skill and creativity, but also for his openness, humor, and encouragement to others in the community.
Alex Cimo’s legacy lives on through his extensive body of work and the countless fans he inspired. His contributions to Yu-Gi-Oh content creation helped shape an entire era of online competitive card game culture.
He will be deeply missed, lovingly remembered, and forever honored by the community he helped build.