炎の刻印 [honoo no kokuin] or 'carved seal of flame' in Japanese.
Tactics Advance
Effect: enhances M-power
Obtain: Fire Sigil, Gulug Ghost
Use: Mind Ceffyl
Other: a mission item
Grimoire of the Rift

Buy: - (sell: 1,500 gil)
Use: Bomb Arm, Flame Rod, Longbarrel, Lotus Mace, Pomegranate Staff, Sumihomura, Peacemaker, Talwar, Flame Shield
Reward: House Bowen's Challenge x3 (once), Bug Hunt x4 (once), Odd Places x3 (limited-time repeatable)
Type: Magicite, Rank: ★★
Description: Powerful magicks transformed a fire spirit into this crystal. How fascinating that something so small could hold the power of a wildfire.
Final Fantasy Tactics S

Buy: - (sell: 200 gil)
Use: ?
Obtain: Northern Great Desert of Niel/Gief Ruins lv30+
Description: An uncommon piece of magicite
Other: 火の刻印 [hi no kokuin] or 'carved seal of fire' instead of the usual one
Category: Item