When Rainsford asked about the giant Cape Buffalo head, Zaroff shows that he has a lot of durability and fortitude. Zaroff can survive being "hurled against a tree" and "fractur[ing]" his "skull" (6). Zaroff shows this by being able to survive a giant brute of a beast. He shows off his immense strength whenever he hunts; in collaboration with the other skills, Zaroff can hold himself together in a fight with animals much larger and stronger.
Zaroff reveals his ingenuity by being extremely smart and having excellent predictions and planning, with being able to have, "invested heavily