The Witcher Bestiary - Greater Mutant
Greater Mutant Occurrence: These creatures were created by Salamandra; they are failed experiments, botched attempts to create a perfect mutant.

Immunity: Similar to very strong and able humans.

Susceptibility: Susceptible to steel swords; the Strong Style is advised.

Tactics: These creatures are slow but strong; their tough skin and thick muscles protect them from blows.

Alchemy: Pituitary gland, beast liver, beast fangs, and mutagen.

The Greater Mutant has proved to be disappointing. It turned out to be a beastly mutant with superhuman strength, terrifying cruelty and scarce intelligence. Fortunately, our masters were satisfied. The Greater Mutant has its place in their plans. I even think that our masters' plan is mainly based on using such creatures.