Your party will probably crush the dragon unless your DM plays it smart. I had an LMOP game in which a 4th level party of 4 took down venomfang in his tower, no magic items no DM Fiat other me not spamming his breath. If you have prep time and your characters are aware they are fighting a green dragon, ask if your character can perhaps find a book to read up on the behaviors of chromatic dragons. You might learn something useful and would definitely give your character a reason to take the spell. <|endoftext|> 