2 embedded clauses
1 adverbial
Semi-colon used to replace a conjunction such as 'and'
4 ambitious words not used before
2 short sentences for impact
Also use:
1 simile, 1 metaphor, 1 personification,
The opener could be this...
A dark, shadowy figure emerged from the woodland and approached the door...
Or
It was a quiet day... A day where all seemed well in the world. Then, a deafening noise echoed across the valley.