Shambler

Shamblers are plant-like monsters in the Garden of Terror battleground.

Starting at 2:30, a seed spawns in one of the four “corner” spawn locations of the map. Protecting the seed are four Shamblers with medium-high hit points and medium-low DPS. Once the shamblers are killed or distracted, a hero must channel the seed for 5 seconds to capture it. Once a seed is captured, it's a random time between 50-80 seconds until the next Shamblers spawn.

When the third seed is gathered, three Garden Terrors will immediately spawn and burrow to the front line of the winning team's lanes, bolstering their pushing efforts.

Trivia

 * On the original Garden of Terror the Shambler came out in the garden area during night. Each Shambler lost 5 seeds upon death. Once your team collected 100 seeds, a vehicle called Garden Terror rose near your Core.