While Wolverine's healing factor is one of the most powerful in the world, it does still have its limits. Incineration and disintegration have proved to be capable of killing Logan for good, and likewise drowning and suffocation are major threats to his wellbeing. In the future of X-Men's 'Days of Future Past,' Wolverine was even slain by a souped-up Sentinel. However, there is one situation where his healing factor is truly perfect, capable of reassembling him in a second even when incinerated by one of the greatest powers in the multiverse.
The version of Wolverine with this staggering capability is 'Wolvie,' a member of the Adorable X-Babies. The X-Babies are artificial beings created by Mr. Veech in the pocket dimension known as the Mojoverse. While created for the entertainment of a multiversal audience, the Adorable X-Babies later settled peacefully in another reality, only for their version of Wolverine to be recruited onto the Exiles to address the threat posed by Kang the Time-Eater — a combined form of Galactus and Kang the Conqueror.
Related: Marvel Explains Why Wolverine's Healing Factor is So Powerful
Sweet but cowardly, Wolvie was deliberately designed to be a kid-friendly Wolverine and his body tends to obey the rules of a reality where violence and death are impossible. The Adorable X-Babies are unable to sustain serious injury — when Wolvie is slashed with a blade, his costume is torn but his skin remains unblemished — and possess broader, more easily comprehensible versions of their inspirations' mutant powers. In Wolvie's case, this means he has the ultimate version of Wolverine's healing. This is shown in Saladin Ahmed and Javier Rodriguez's Exiles #4, when Wolvie goes up against Kang the Time-Eater.
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