My Lands: Black Gem Hunting

Some quest i think are too long
Life is short I think this new quest might take 3 year i dont know to bother start maybe server is dead by time i finish

Usually, it depends on many factors how much time a quest takes. If you feel that a quest takes too long, you may consider not completing it. None of the quests are obligatory. You can enjoy the game without having done any.

I know but i think they are slightly too long maybe 400 instead of 500 , and 200 instead of 250 is better numbers more realistic to complete before i die from old age

May I ask what the numbers 400, 500, 200, 250 stand for?