Magic Gem

Magic Gem (魔法の宝石, Mahō no Hōseki) is a support-type Holder Magic used by Tyche Fortuna of the Burning Catarina Guild. Though a support-type magic, Tyche has found a way to use offensive spells with this magic.

It makes use of magical gems that can have various effects when filled with Tyche's own magical power. These effects can vary depending on which gem is used by her, they can heal wounds, create shields and various others.

Gems
Tyche doesn't usually specify exactly what kind of gem she's using, typically only identifying them by their colors or by the element they create. Enhancements caused by the gems usually only last ten minutes.

Red Gem (赤い宝石, Akai Hōseki): This gem enhances the physical strength exponentially of Tyche or whomever she's bestowed the effects upon.

Purple Gem (紫の宝石, Murasaki no Hōseki): This gem increases the magical strength, magic reserves, of Tyche or whomever she's bestowed the effects upon. If Tyche uses this gem, and then one of the others she can double the effectiveness of the gems.

Blue Gem (青い宝石, Aoi Hōseki): Tyche uses this gem for healing the physical wounds of her allies or her own. If used after the Purple Gem, she can reattach severed limbs or restore movement to paralyzed apendages.

Green Gem (緑の宝石, Midori no Hōseki): Tyche uses this gem to create shields and barriers or negate spells. If used after the Purple Gem she can even block or negate Wave.

Fire Stone (耐火石材, Taika Sekizai): After channeling her magic through this gem, Tyche can attack with several small Fire Bullets. If the Purple Gem was used first then this gem fires what looks more like a Hell Prominence spell.

Water Stone (水の石, Mizu no Ishi): After channeling her magic through this gem, Tyche attacks with several small Water Bullets. If Tyche uses the Purple Gem first then this gem launches what acts like Water Cyclone.

Lightning Stone (雷の石, Kaminari no Ishi): Tyche, after channeling her magic through this gem, attacks with several small Thunder Bullets. After the use of the Purple Gem, then this gem launches more of a Lightning Cyclotron attack.

Gem Combinations
Tyche has shown that the effects of gems can be combined, more than just using the Purple Gem to power up following attacks.

Green Gem Combos: By combining the Green Gem with any of the other Gems improves the durability of the generated shield and also adds an additional effect.
 * Plus Red Gem: by combining the Green and Red Gems, Tyche creates a shield that restores strength to whomever is behind the shield, by turning magical energy from blocked attacks into physical energy.
 * Plus Purple Gem: by combining the Purple and Green Gems, the resulting shield transforms the magical energy from the opponent's attacks into magical energy for whomever is standing behind the shield.
 * Plus Blue Gem: by combining the Blue and Green Gems, Tyche makes a shield that takes the magical attack and uses the magic from the opposing spell to heal whomever is standing behind the sheild.
 * Plus Element Stone: by combining the Green Gem with one of the Elemental Stones, Tyche creates a shield of that element that, when attacked, lauches a wave of the element in retaliation.

Limitations
The gems only work if Tyche has filled them with her own magical power, the gems being rendered useless if someone else tries using them.

The gems are also incredibly fragile and break after a few uses. If an opponent were to focus on attacking the gems before Tyche uses them, then they can render her useless in battle.

With the problems that can arise from use of this magic (gems breaking or becoming useless) Tyche is forced to carry several gems with her at a time, this can also cause the problem of giving the opponents a place to aim to destroy her Magic Gems.

Trivia

 * Though refered to as 'Stones' they're still counted as gems