Six-Armed Serpent Demon

A female gamer who is proficient in side-scrolling and real-time strategy games is reincarnated into another world as a six-armed snake demon.
As a demon, he was born with six arms, which were meant for killing people.
There is no emotional subplot.
and so--
Of all things, only the kitchen knife is noble.
Skills are valuable, but magic is even more powerful. But for the sake of killing, both can be abandoned.