Here "deceit" is spoken of as if it is a person who will prosper. Alternate translation: "the amount of deception will increase" (See: [[rc://en/ta/man/jit/figs-personification]])
"the mightiest prince" or "the prince who rules over all other princes." Most English versions capitalize the word "Prince" because the phrase probably refers either to God or to a man whom God appoints to rule.
Here "hand" refers to power. This can be also stated in positive form. Alternate translation: "not by any human power" or "by divine power" (See: [[rc://en/ta/man/jit/figs-metonymy]])