A character unexpectedly punches two characters in the face. Fairly intense.
A girl's leg is broken. Although the act is offscreen, you hear a grisly cracking sound, and see the leg contorted and purple.
A character's dismembered ear is shown twice, blood dripping from it.
Characters are seen dead in dreams with minimal blood
Season 2 frequently has a lot of blood and dismemberment throughout, unlike season 1 which is relatively tame and has only a few violent moments.
In season one episode 1 you see a girl covered in blood with a red flower sticking out of her chest and the girl is 6 years old