The X-Men's resident Fuzzy Blue Elf, aka Nightcrawler, has been an eternal man of mystery. Yellow of eye and forked of tail, Nightcrawler is easily one of the most iconic members the mutant team has ever had, and yet for all his fame and popularity, there has been very little definitive information given to his origins. Fans have learned piecemeal over the years that young Kurt Wagner was driven out of his hometown due to his monstrous appearance before living in a circus, where he was then rescued by Professor X. The details that have followed Nightcrawler's traumatic origins have become as murky as one of his BAMF clouds, and that confusion lies in part with his relationship with his mother, the mutant villain known as Mystique. With his upcoming story promising to finally lay to rest the mystery surrounding his origins, Nightcrawler will either have his relationship with Mystique strengthened or destroyed.
Source：https://www.cbr.com/nightcrawler-history-with-mystique-getting-more-complicated/
