Author Jon Mayhew is Literacy Laureate at Alsager School. Read the first chapter of his novel Monster Odyssey’: http://media.bloomsbury.com/rep/files/monster-odyssey-chapter-extract.pdf
Draw your own monster and use the best descriptive words you can think of to describe all it features. Why not use a thesaurus to find words that mean the same but will add new words to your vocabulary; why use the word ‘big’ when you could use ‘colossal’.
You can find out more information about Jon and his books on his website: https://www.jonmayhew.co.uk/