若木の杖 [wakaki no tsue] or 'sapling staff' in Japanese.
Mobius

Sapling Staff
Stats: ATK +3, Break +3, MAG +10%
Auto Abilities: -
Obtain: Apprentice Mage job card
Cost to obtain: (available by default)
Type: Mage Weapon, Rarity: ★
Sapling Staff+
Stats: ATK +16, Break +12, MAG +15%
Auto Abilities: -
Obtain: from Sapling Staff with Apprentice Mage skill panel #2
Cost to obtain: 300 Water
Type: Mage Weapon, Rarity: ★★
Other: 若木の杖+ in Japanese
Sapling Staff+2
Stats: ATK +29, Break +21, MAG +20%
Auto Abilities: Raise Limit Break gauge with Attack +1
Obtain: from Sapling Staff+ with Apprentice Mage skill panel #3
Cost to obtain: 3,600 Water
Type: Mage Weapon, Rarity: ★★★
Other: 若木の杖・改 in Japanese
True Sapling Staff
Stats: ATK +42, Break +30, MAG +25%, SPD ★
Auto Abilities: Raise Limit Break gauge with Attack +1
Obtain: from Sapling Staff+2 with Apprentice Mage skill panel #4
Cost to obtain: 24,000 Water
Type: Mage Weapon, Rarity: ★★★★
Other: 真・若木の杖 in Japanese
Category: Equipment