Nanana collections are treasures usually enforced with mythical powers, hidden throughout Nanae Island. Nanana collections are usually encased in a treasure box, to obtain a Nanana collection, one has to pass through obstacles and traps. When all obstacles are cleared the Nanana Collection will be reachable and all traps will deactivate.
Eye of Yuguthos
Crystal The first Nanana Collection shown is a 'Light up if lie' crystal.
It's was first shown in a black box which ended up in an alley after an attempted theft for the crystal. The ability of the crystal is shown through looking through it. If what the person telling you is a lie there will be a presence of dark aura around the liar, if not lying there will be nothing around it. Nanana calls its the Lustrous Lie Detector (at least in the anime).
Xian Cha Fei
The Nanana Collection's Tea Pot
The second Nanana collection shown was a tea pot that required only water to brew aromatic tea. The collection was hidden in a trap activated room (a classroom) treasure box with the numbers 777 pinted on it. It was an entry test for new Adventure Club members to complete the obstacle in the room.
Wizard Cane
Wizard Cane
The Wizard's Cane (魔法使いの杖 Maho-Tsukai no Tsue?), or officially named as Dovold Van Zamus' Cane (ドボルド・ヴァン・ザムスの杖 Doborudo Ban Zamusu no Tsue?) is a magic cane of Nanana's Collection. The cane has the ability to grant it's user wishes but is limited. It was earned by completing a maze that has depleting traps and path that is reforged and harden every five minutes. Following the path will take you to the treasure box with the wizard cane hidden in it. After which the whole maze self-destructs leaving only the stand withstanding the treasure box.
Shadow Fins
The Shadow Fins are magic boots of Nanana's Collection. These boots allow the wearer to move instantly through shadows. Rather to being able to move throught shadows these boots allow the wearer to use them as swimming fins to swim through the shadows. The time the user is able to do this depends on how long they are able keep their breath. At the moment its unknown from what ruin these boots where acquired. but are currently in possesion of Hīyo Ikusaba.