 Jamie Delano returned to the title on several occasions . Between the Garth Ennis and Paul Jenkins runs on Hellblazer , he finally told the story of why John 's best friend Chas ' <unk> ' him , and he returned again for one of the five Christmas stories in issue # 250 . He also wrote the mini series The <unk> in 1995 , and Bad Blood in 2000 , both featuring John Constantine . A more substantial return was made in 2010 for a hardcover graphic novel Hellblazer : <unk> with artist Jock to commemorate the 25th anniversary of John Constantine 's first appearance in Swamp Thing . 
