CWs include, but aren't necessarily limited to: Minor medical, torture (mental and physical), Mind fuckery on a grand scale, institutional oppression on a species-wide scale, some gore, harsh language, interpersonal drama in some cases, a sense of melancholy and fear and loss in some places.

(Trying to be as comprehensive as possible here, but I might be misremembering, forgetting, or over-focusing on something!)