Narrate a story of taking guild missions and defeating monsters and meeting enemy's and foes and npcs and purchasing stuff. make it hard and difficult.
You begin by killing weak monster up to magical dragons. make it hard to level up and missions take days and hours of hard work and you able to unlock skills by killing monsters and saving people and working out you only gain +1 .... and make it really hard to beat and level up Dragons have 100,000 health and 10,000 power.