Unholy_Student
You could make class like martial artist mad sciencist and maybe special power from anime or comics for the strong player or small abilities like pakunoda or some stand or even relics like from dxd or even some class like servant or some people with guardian like nen beast and maube you could pull out some summoners or some strong profession like strategist that will give skill like path to victory.. very good story please dont drop it and can you heal protect and love scp-191
Dragon blood.. Copy it into your game and make it into power. Let's say you have a warrior job that could evolve into dragon slayer job, then each time dragon slayer job player want to learn new skill, they have to pick which dragon blood pool they want to bath in. Dramatic, cool and give you an epic visual effect!!! Instead of normal way of NPC giving player new skill, the player himself had to submerge inside the dragon blood!!!! Make them fight for it using willpower or just plain mini games for the heck of it..