Quests and quest keepers!

Humans you can find located in different biomes and realms that give players quests, there are general quests, biome specific quests and realm specific quests. Quests start at an easy level and increase difficulty, realm quests start of relatively hard as more experienced players are more likely to be there. The quest "keepers" reside in small wooden cabins/huts and players can only move onto a new quest when the current is finished. Quest "keepers" seem like mythical, saged humans with a large array of minecraft knowledge and can give the player a "helping hand" if stuck on a quest. Quests give rewards, the harder the quest, the greater the reward. For example an easy quest may result in the player being given 10 pieces of iron, medium quests may result in a stack of iron and hard/extreme quests may result in rewards such as stack of diamonds, entire collection of records with the record player etc etc.