AeternoBlade will have Arena Mode DLC

Corcell Technology has a bunch of DLC lined up for AeternoBlade. One of these items, as revealed on the game’s Facebook page, is “Arena Mode”.

Arena Mode provides players with the challenge of clearing all 20 waves of enemies. Corcell recommends that you complete the story mode first, as Freya will need to be equipped with a suitable relic set.

Arena Mode DLC is a mode that you have to clear all 20 waves of enemies , our staffs recommend that you should clear story mode before play it as it need to use Freya with suitable relic set.

Source, Via