[Illusion]

They can only be used once per day. They reset automatically at midnight your time based on your Wii U clock data.

To use them you go to the collection menu (press down on the D pad). Link and Toon Link Amiibos count as their own seperate Amiibo but have the same function, using one Link maxes out you arrows full capacity. You have 5 arrows? Now you have 30. Need it again? Use the other Link Amiibo.

Zelda/Sheik both operate in the same way and replenishes all your hearts.

Then Ganondorf Amiibo can be activated at anytime and increases the heart damage. AKA. Unlocking hard mode. So Ganondorf + Hero Mode = Zelda harder then Bloodborne/Dark Souls/Demon Souls combined THE GAME.