Minecraft wiki entry for ED, associated text: Entity data
Tags common to all entities[show]
Tags common to all mobs[show]
 BoundX: When a vex is idle, it wanders, selecting air blocks from within a 15×11×15 cuboid range centered at X,Y,Z = BoundX, BoundY, BoundZ. This central spot is the location of the evoker when it summoned the vex, or if an evoker was not involved, BoundX, BoundY and BoundZ do not exist.
 BoundY: See BoundX.
 BoundZ: See BoundX.
 LifeTicks: Ticks of life remaining, decreasing by 1 per tick. When it reaches zero, the vex starts taking damage and LifeTicks is set to 20.