See also: Cube Rain
Zombie with block field, or alternatively, Block Field Zombie, is an entity that can randomly be encountered on the Surface. Its spawns are seemingly at random and rare, although it has been most commonly been seen near the front of the Spawn Building and Garage.
The block field moves up and down, in waves and remains above the zombie at all times. After killing the zombie, the field will linger over where the zombie was when they died. The field will move up and down faster- until eventually bursting apart, causing the blocks to fall down. After the field explodes, the blocks will gradually disappear along with an audible coughing sound.
The Block Field Zombie will play a continuous heartbeat sound effect. When the block field speeds up on death, so does the heartbeat sound effect and will stop when the field explodes.
- Upon killing the zombie, the kill feed refers to it as "gm13_npc_hydra"
- It is possible for the Block Field Zombie to spawn underneath the map as shown below the "Documentation" section.
Note: I found a video, but its quality is bad so please find a better-quality video thx.