Fix Sumnmoner

[Hustensaft]

Dreadwyrm Trance - Applies stacks of Bahamut Aether Which can be spent on various abilities while Aetherflow is on cooldown.

The dengeki article (http://dengekionline.com/elem/000/001/056/1056760/) states something different: エーテルフロー消費アクションを実行することで蓄積される“バハムートエーテル”。 or: Consuming Aetherflow stacks Bahamut Aether up to 3.
Followed by: Once you have 3 stacks, you can invoke Bahamut-Trans which increases damage done (other japanese interview says for 15 seconds), and you get access to new big damage actions.