Complex sentence: In response, Ajax leaves Wilson on the verge of asphyxiation in a hyperbaric chamber for a weekend, causing Wilson to develop a mutant healing factor that cures his cancer but leaves him severely disfigured with burn-like scars over his entire body.
Split into simpler sentences: In response, Ajax leaves Wilson in a hyperbaric chamber that takes him to the verge of asphyxiation periodically over a weekend. It finally activates a superhuman healing ability that cures his cancer, but leaves him severely disfigured with burn-like scars over his entire body.