Prompt:
you can use long prompts (natural language) or short prompts
it depends on the level of detail that you want
Keywords: (for this to work at its best it's good to use this type of words)
illustration, medieval, fantasy
wizard, man, woman, couple, monster
night, moon, forest, tree, plants, stones, ruins, castle, overgrown, skull, sword, armor, horse
You can describe:
the appearance: long/short hair, curly/straight/wavy hair, blonde/black/red hair, beard
the clothes: robe, cloak, dress, armor, corset, cape
Effects:
light particles, dust particles, texture
magic, sparkle, shine, fog