Training Tower

The Training Tower is a set of eleven map levels called stratum (plural, strata) where players can train their units for Experience and Skill Points, which can be accessed by going to Battle > Training Tower. These maps are chosen from the pool of all cleared Story and Paralogue Maps, while the enemies are randomly generated. Since version 1.6.0, it is possible to freely re-randomize the strata before choosing one.

Stratum Level Breakdown
The recommended level for each stratum is displayed in the title banner of the stratum. For the Fifth Stratum through the Seventh Stratum this value is the level of the leader. As the Stratum level progressively increases, so do the recommended levels and stamina cost. The stratum level and stamina breakdown is as follows:

Rewards
Players can earn specific Shards, Crystals, Badges and Great Badges on certain days when completing a stratum.

Shards and Crystals are used for leveling up units. Shards can be found on any stratum, while Crystals have a chance of being found in the Sixth Stratum and higher. These can be earned once a day after successfully completing a stratum.

Badges and Greater Badges are used for promoting units to higher star rarity level (eg. to ). Badges can be found on any stratum, while Great Badges have a chance of being found in the Sixth Stratum and higher. Unlike Shards and Crystals, there is no limit on how many Badges can be earned daily after successfully completing a stratum.

Randomized Units
Enemy Heroes in the Training Tower are selected randomly from the below pool of Heroes: