Use Dragonflowers

Use Dragonflowers is a feature introduced in Version 3.2.0 where the player can use Dragonflowers to increase the stats of a unit. It can be found under the Ally Growth menu.

Details
Dragonflowers may be obtained from Heroic Ordeals or Aether Raids. Similar to merges, Dragonflowers grant additional stats to a unit that persist across all game modes. However, unlike merges, Dragonflower-enhanced stats will have no effect on Arena scoring and matchmaking.

Most heroes are eligible for 5 dragonflower enhancements, but heroes released before are eligible for 10 enhancements, and  heroes released before version 3.2.0 are eligible for 15 enhancements instead.

Spending Dragonflowers
There are four types of Dragonflowers, one for each of the four movement types:, , , and. To enhance a unit, Dragonflowers matching its movement type must be used. Each enhancement will cost more Dragonflowers than the last, but the pace of this increase differs based on how many enhancements a unit is eligible for:

Dragonflower Stat Bonuses
When a unit receives a Dragonflower enhancement, one of their stats will increase by 1 point. The stat selected for each enhancement is the highest level 1 raw stat for the hero (after accounting for Asset and Flaw) that has not yet been increased by a previous enhancement. This amounts to an increase of 1 to all stats at 5 enhancements, 2 to all stats at 10 enhancements, and 3 to all stats at 15 enhancements.

If there is a tie between two level 1 stats, the stat to be increased is chosen with the priority of HP > Atk > Spd > Def > Res.

Because HP is always a unit's highest level 1 raw stat, HP will always be the stat increased at +1, +6, and +11.

Miscellaneous

 * If two units that each possess Dragonflower enhancements are merged, only the higher amount of enhancements carries over to the resulting unit. The lower amount of enhancements is lost.
 * If a unit with Dragonflower enhancements is turned into a Combat Manual, their enhancements will not be recorded in the manual, and will thus be lost.