>>104216362he was originally a feral mutant. stronger, faster, better instincts, more agile, etc. plus healing factor and a berserker rage that makes him unfeeling and rabid
imagine a human version of an actual wolverine or honey badger.
then they put unbreakable metal on his bones so he's super heavy, but was always and is strong enough to move quickly w that new weight. hes 5'3" 300lbs now. thats like a small rhino that moves like cat and punches that weight into claws
thats superhuman explosiveness and strength just to still move that fast, now plus unbreakeable claws and bones that combined w his instincts and rage, mean he can go crazy for as long as he wants and come back.
add legit ninja/samurai training and at least one lifetimes worth of the best blackops assassin training and experience possible.
now hes a small super ninja/assasin, unbreakable, psychotically aggressive, and vicious self healing rhino. that moves like cat, and punches w unbreakable claws that cut everything.
even if you're juggernaut, you might be stronger and he wont beat you, but you'll have a hard time beating him.
even harder time killing him. and a worse time if he decides to start stalking you to kill you.
sabertooth is that, but w/out the adamantium. like if a sabertooth was humn and feral