Episode 20 - The Blue Guy Whose Accompanied by the Thunderstrike (December 11)
Hudram summons a blue devil from another universe, and it seems to be related to Yuzare in the past.
Episode 21 - The Devils Once Again (December 18)
Two ancient devil beasts from 350 million years ago are released from their capsules, forcing Kengo and Ignis to join forces.
Episode 22 - Last Game (December 25)
Ignis kidnaps Yuna as the gate to Eternity Core has been opened.
[Source: Ben77878871, reiwakaijuchronicles (link 2)]