View source for Enhancement Card

Enhancement cards include [[Leveling|XP cards]] and Fou cards. These can be fed to your servant from the Enhancement screen to increase their level, ATK, or HP, depending on the item. 

'''Hero Crystals/Fou cards''' increase a [[Servants|Servant's]] HP or ATK stat permanently, turning the increased stat yellow. Hero Crystals can only be fed to the same class as target servant's class, unless it is an '''All-Class''' Hero Crystal.The current amount of stat points boosted on a Servant can be seen just below their HP & ATK stats at the Servant Status or Servant Enhancement screens. Each Hero Crystal fed also gives 12 experience points.

4★ Hero Crystal/Fou cards require either HP and ATK of the servant to be boosted up to 1000/2000 points, corresponding to the card's enhancement type, before they can be used.

===How do I acquire Hero Crystal Cards?===
*1★ to 3★ Class-specific Hero Crystals can be acquired through the [[Friend Point]] Gacha. <br />
*3★ All-Class Hero Crystals can be purchased for 20 [[Mana Prism]]s each (Maximum of 20 monthly) from the [[Mana Prism]] shop.
*3★ All-Class Hero Crystals can also be acquired as event rewards, or purchased from event shops. <br />
*4★ All-Class Hero Crystals can currently only be obtained through event shops. <br /> <br />

Alternatively, any 3★ or 4★ Hero Crystals can also be [[Burning|burned]] in exchange for [[QP]] and [[Mana Prism]]s.

{| class="wikitable" style="width: 100%; text-align:center;"
! style="width: 10%;" |Enhance
! style="width: 40%;" |Name of Card
! style="width: 10%;" |Stat Increase
! style="width: 20%;" |Usable from <br />0 ~ 990
! style="width: 20%;" |Usable from <br />1000 ~ 1980
|-
| rowspan="4" |HP<br>{{I|Hero Crystal - Star Fou}}{{I|Hero Crystal - Meteor Fou}}
|★1：英霊結晶・宵闇のフォウくん<br />Hero Crystal - Twilight Fou
|10
|<div style="color: blue;">YES</div>
|<div style="color: red;">NO</div>
|-
|★2：英霊結晶・煌めくフォウくん<br />Hero Crystal - Radiant Fou
|20
|<div style="color: blue;">YES</div>
|<div style="color: red;">NO</div>
|-
|★3：英霊結晶・星のフォウくん<br />[[Hero Crystal - Star Fou]]
|50
|<div style="color: blue;">YES</div>
|<div style="color: red;">NO</div>
|-
|★4：英霊結晶・流星のフォウくん<br />[[Hero Crystal - Meteor Fou]]
|20
|<div style="color: red;">NO</div>
|<div style="color: blue;">YES</div>
|-
| rowspan="4" |ATK<br>{{I|Hero Crystal - Sun Fou}}{{I|Hero Crystal - Corona Fou}}
|★1：英霊結晶・明けのフォウくん<br />Hero Crystal - Dawn Fou
|10
|<div style="color: blue;">YES</div>
|<div style="color: red;">NO</div>
|-
|★2：英霊結晶・輝けるフォウくん<br />Hero Crystal - Shining Fou
|20
|<div style="color: blue;">YES</div>
|<div style="color: red;">NO</div>
|-
|★3：英霊結晶・太陽のフォウくん<br />[[Hero Crystal - Sun Fou]]
|50
|<div style="color: blue;">YES</div>
|<div style="color: red;">NO</div>
|-
|★4：英霊結晶・日輪のフォウくん<br />[[Hero Crystal - Corona Fou]]
|20
|<div style="color: red;">NO</div>
|<div style="color: blue;">YES</div>
|}

<gallery>
Icon_Item_Hero_Crystal_-_Star_Fou.png|Hero Crystal - Star Fou (HP)|link=[[Hero Crystal - Star Fou]]
Icon_Item_Hero_Crystal_-_Sun_Fou.png|Hero Crystal - Sun Fou (Atk)|link=[[Hero Crystal - Sun Fou]]
Icon_Item_Hero_Crystal_-_Meteor_Fou.png|Hero Crystal - Meteor Fou (HP)|link=[[Hero Crystal - Meteor Fou]]
Icon_Item_Hero_Crystal_-_Corona_Fou.png|Hero Crystal - Corona Fou (Atk)|link=[[Hero Crystal - Corona Fou]]
</gallery>