It’s about drawing people in. It’s about creating a tone, and slowly tuning it so that everything becomes threatening. It’s hard to do the sharp-shock of horror in comics, but it is possible to create a real miasma of disturbingness (which may not be a word). Bit by bit, you can worm your way into a reader’s head and, not outright scare them, but disturb them… create genuine revulsion, so that they feel like they need a shower afterwards.
— Warren Ellis.