Testing Gate

The Testing Gate is the main gateway to the Zoldyck Family's estate, guarded by Zebro. It consists of seven doors. Each of the 2 panels of the first, smallest door weighs 2 tons, and a bigger panel weighs twice as much as the panel immediately preceding it. The gate is designed so that it opens the door corresponding to the strength of the pushing force.

In order to enter the estate safely, one must open the Testing Gate. Those who enter the estate in any other way will be at risk of being attacked and kiled by Mike, a trained giant guard dog of the Zoldyck Family.

Before Killua receives any form of Nen training, he could open up to the third door, weighing 16 tons in total. After spending 20 days training with heavy equipments, Gon, Kurapika and Leorio could also open it, but only Leorio could open up to the second door, which weighs 8 tons. When Killua returns home after the Chimera Ant Extermination mission, he opens the 5th door, weighing 64 tons.