en_tn/2ki/17/17.md

used ... enchantments

used magic to say what would happen in the future

sold themselves to do that which was evil in the sight of Yahweh

To "sell themselves" is a metaphor for committing completely to do that which was evil. Alternate translation: "committed themselves to do things that Yahweh said were evil" (See: rc://en/ta/man/jit/figs-metaphor)