Wiki/seteventgravity
Event builder: the gravity for everyone in the event, 0.0005-0.1 or normal (0.008; lower floats, higher pulls down)
In the game
Usage: /seteventgravity <0.0005-0.1 | normal> (normal is 0.008; lower floats, higher pulls down)
What it does
Not explained in detail yet.