Combination padlock

This padlock would be made with a nether star, 6 obsidian and 2 stone buttons. This padlock could be placed in chests or doors, when placing it it will ask you to put a combination of 6 different runes, these runes could be from the galactic language or those of the end crystals. Once the combination is set, you could open and close the chest or door without problems, but if a different player tries to open the chest or door, he will have to put the combination chosen by the player who placed the lock.
For each mistake the padlock would make a sound similar to that of the endermans when they shout, in addition to consuming a quarter of the experience of the player who failed. The player who placed the lock could remove it while crouching and right clicking with nothing in hand. The chest or door would be unbreakable as long as it has the padlock.