Sad tributes are pouring in for the Marvel artist who worked on the X-Men, who died at the age of 52.

Marvel comic artist John Cassaday died on Monday at the age of 52. He was best known for his work on Astonishing X-Men.

Many moving tributes have been written for the artist, who was remembered by fans as a truly unique artist.

Robin, Cassaday’s sister, was the first person to tell people that her brother had died.

There was a death in my family at 6:51 p.m. Texas time. My sister told him, “Please pray for me and my mom.”

They haven’t said what killed Cassaday yet, but Robin did say that he was in the intensive care unit for six days before he died.

Robin said he was stable at the time, but he was worried about his brain.

“All of his organs and heart are working normally. “My main worry is about his brain,” Robin wrote as she asked for prayers.

Before working for Marvel and DC, Cassaday got his start in the comic book business in 1997, when he started working for Dark Horse and Homage Comics.

While working for two of the biggest comic book companies, Cassaday wrote stories for the X-Men, Superman/Batman, and Captain America.

His most famous work, though, was co-creating the DC comic Planetary with Warren Ellis.

Before ending in 2009, the comic had 27 issues that were well received.

Both the TV miniseries Astonishing X-Men and the TV show Dollhouse were Cassaday’s first movies as a director.

Aside from that, he made designs for Levi’s and Ringling Bros. & Barnum Bailey Circus.

Prior to his passing, Cassaday was in charge of creating new stories for Humanoids and bringing back Marvel’s Star Wars comics.

SHARING TRIBUTES

After hearing the news, the artist’s friends and fans have paid tribute to them.

In a touching Facebook post, comic book writer Mark Waid called Cassaday “one of the most gifted and sought-after comic illustrators of his generation.”

“I refuse to take any real credit for ‘discovering’ John Cassaday,” Waid wrote. “I couldn’t even take credit for having eyes that work.”

But after that, we were friends for life, and it was amazing to see how quickly he became one of the best and most sought-after comic book artists of his time.

“John Cassaday, I will say without hesitation and with very little fear of disagreement, was one of the very best illustrators and storytellers to ever work in the comics medium.”

“Just getting over the death of our friend John Cassaday. He was one of the best comic artists of all time and a really nice person.” Even though no one has come close to his body of work, “he lives on in our memories and on our shelves,” wrote comic artist Mark Millar.

The work of John Cassaday has left an indelible mark on me and on the whole industry. Writer of comics Scott Snyder said, “This is a huge loss for the comics community.”

A different person said that Cassaday was a “artist of limitless talent.”

“Pluto, John Cassaday, your Planetary was one of the most important comics I saw in real life. And your Super Hero. Your great X-Men too. Another fan wrote, “Damn, what a huge loss.”