You can raise the land up or lower it down according to your wishes, just make sure your neighbor is not to perturbed by it, otherwise you might find yourself in a spot of trouble. It is possible for one to terraform the entire map and create new structures out of it.
‘Peria Chronicles’ is an upcoming MMORPG where the entire world will be created and generated by players. They are not fun at all and introduce a lot of repetitiveness to the game. Some of the grinds are a bit too tedious, so if you are a developer and reading this then please acknowledge the issue of tedious boring grinds in MMORPGs. The story does feel a bit lacking at times but the combat mechanics are quite fluid and you will find yourself getting hang of the game quite easily.
‘SoulSaver Online’ is a game that has received a lot of backlash from the community due to its pay to win mechanics but the game is quite good at its core.