Enhancement Card

Enhancement cards include 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 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.
3★ All-Class Hero Crystals can be purchased for 20 Mana Prisms 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.
4★ All-Class Hero Crystals can currently only be obtained through event shops.

Alternatively, any 3★ or 4★ Hero Crystals can also be burned in exchange for QP and Mana Prisms.

Enhance	Name of Card	Stat Increase	Usable from 0 ~ 990	Usable from 1000 ~ 1980
HP	★1：英霊結晶・宵闇のフォウくん Hero Crystal - Twilight Fou	10	YES	NO
	★2：英霊結晶・煌めくフォウくん Hero Crystal - Radiant Fou	20	YES	NO
	★3：英霊結晶・星のフォウくん Hero Crystal - Star Fou	50	YES	NO
	★4：英霊結晶・流星のフォウくん Hero Crystal - Meteor Fou	20	NO	YES
ATK	★1：英霊結晶・明けのフォウくん Hero Crystal - Dawn Fou	10	YES	NO
	★2：英霊結晶・輝けるフォウくん Hero Crystal - Shining Fou	20	YES	NO
	★3：英霊結晶・太陽のフォウくん Hero Crystal - Sun Fou	50	YES	NO
	★4：英霊結晶・日輪のフォウくん Hero Crystal - Corona Fou	20	NO	YES