coolwater: You have to set up for back stories, and you never reveal it all at once. I like to paint a picture with words, but it is much easier to give guidelines and history without any of that, but the details are important. Next you could add tid bits about a the history use single elder (npc) then give him a little personality strange, dark, or mysterious. Next add in some additional characters in a combat scene. Maybe some playful banter that explains the classes a little and how we work together. Then you need plot twist such as character is kidnaped which could allow more explination of world history. Then set up maybe introduce some towns leading to climax of save chacter. Just sprinkle history everywhere in describing gear, classes ,npc ect.

coolwater: *coughs*

A bright light, and loud crackling sound erupted from the young warriors finger tips as the large behemoth, full of rage swungat the young warrior. His new equipment made him agile enough to evade the creatures clumsy attacks with ease. Genchaone launched a powerful strike that subdued the beast. All his training form the elders of the town had paid off. The elders had taught Genchaone powerful spells to protect Gaia. Spells passed down for generations

luminary: Later on, the dimensions is reopened but know one knows why or who did it all that the people knew is they need to go out there and prevent the impending doom to mankind so the prophets made a call to gather strong and brave people from all of the lands this includes the barbarians and the paladins, but a new races stood up for glory, the druids, despites of being small and weak physically ,they have the power of lifting tons of soils to enemies using there staff in which they channel their inner energy calle mana, they believed to have the ability to cast fire, lightning bolts and ice to monsters that they encounter hence giving them a very good reputation in the battle fields. So there again they journey to the unknown midst and fight the monsters and the mighty dragons but they got all greedy that they turned on each other for all of them want to get the curse of the first slayer of the mighty black dragon. One remarkable man from the druids race named 'diablo' by his clan for he had the willingness to slay the unforgiving beast slayed the black dragon once again. Because of the wisdom of the of the druids they unraveled some signs and ancient writing in the lands and they came upof a very strong artifacts so rare they called it 'legendary weapons and armors'. And they returned to Gaia to celebrate the victory and recieved the curse of being a diablo and his power is ought to use for good , but it didnt turn our that way. The new diablo became greedy of power,they raided cities, siege the castles, and killed the one who standed their way to prove their supremacy in the lands of Gaia. Later on another druids from his Diablo's clan pursued the curse of madness to gain power made their way to the other dimension everytime it opens up again. One is called 'thriller' coz he dont fight the weak but the stronger to him ,he likes thrills in a fight, the other one is called Shatter for her remarkable ear drum shattering scream. They both achieved the name of a diablo after slaying the mighty black dragon and its family of dragons.

luminary: Once upon a time in a (not) far away land named Gaia, there lived a god named Dreamer. He is believed the creator of all things and creatures that live in the said land. Some people worship him some dont, and when he found out he summons mighty dragons to punish the ones that will not obey him. He made some humans from all other race to become his prophets and people call the moder ators, moder ators are the one responsible for the equality and peace in the lands.
Then some wisemen told a rumor that there is a new dimension that will open overtime for the unimaginable beasts to come out and to prevent this, a band of heroes and villains came to that new dimension to see it for themselves and prevent a chaos to the lands of Gaia. The race is on to who will be the slayer of the mighty beast that is so strong nobody lived to tell the tale untill that day. A strong hero from the lands of desssert ,a barbarian, who is claimed to be a saint but committed sin and want no other than redemption slayed the mighty beast and claimed the glory soon before they and all of the people who tried to slay it return to the world of Gaia and he named the beast Black Dragon. He is so proud that he put the scale of the mighty dragon to his armor. What he didnt know that who ever slay the mighty dragon will get it's curse and yes he became a new being and feared by many ,he was called a Diablo. On the otherhand, a strong oldman man born and raise in the fortresss of the castle Erathia in the kingdom of humans , didnt go with the band , hence he focus himself training and fighting beast in the lands and he got too much experience in fighting the god DREAmer cursed him ,he became a diablo also. These new creature can blend in like humans they have the ability to become anyone but sooner they always show their true appearances , the muscular body (bcoz they go to gyms) , the horns (not ur car's horns), the claws that can pierce even to the thickest metal the man can craft and most of all the ability to cast all any spells there is(ugh i forgot to tell there are spells already) one remarkable spell they only knew is the Black dragon slayer , its so powerful it can burn a city down(they didnt cause bushfires so dont worry).