Sven Kleinstock

Sven Kleinstock is a mutant villain who debuted as a member of the Acolytes, Magneto's fanatical followers, alongside his brother Harlan. The Kleinstock brothers can psionically merge their bodies to boost their physical power and energy-blasting abilities.

Debuting in Uncanny X-Men #298 in 1993, Sven Kleinstock arrived during one of Marvel's most turbulent and ambitious eras for mutantkind, brought to life by the sharp creative pairing of Scott Lobdell and Brandon Peterson. An X-Men affiliate whose adventures have stretched surprisingly across nearly three decades, Sven keeps genuinely compelling company — sharing pages with the likes of Harlan Kleinstock, Joanna Cargill, Amelia Voght, and Carmella Unuscione, a roster that signals he moves in some of the most charged corners of the Marvel mutant universe. With key appearances spread across Uncanny X-Men, X-Men, and Magneto: Dark Seduction, he's a rewarding discovery for collectors who love digging into the rich, layered ensemble storytelling that defined the Copper and Modern Age X-books.