Monster Stones in Zelda: Echoes of Wisdom are used for repairing Automatons in Dampé's workshop. You'll need to collect a few if you want to repair your favourite Automatons, but luckily you now know that there are a few different ways of finding them.

For the most part, automatons are completely skippable, though they are somewhat useful in taking down swarms of enemies at once. You can clear the whole game without them, as the only thing that specifically requires an automaton is a side quest: “An Out-There Zol.”

Echoes of Wisdom, especially during combat. So, here’s how you can unlock every Automaton and what you need to make them.