Monster Strike: Kieyuku Uchuu-hen
Second part to Monster Strike 2.
Ren and his friends race to save the world from the apocalypse prophesied by the monster Nostradamus. When Mana discovers the truth about her origins and her role in the events to come, she becomes the key that could change everything...for better or for worse.
Unlike its predecessor, The Fading Cosmos is not animated in full CG, returning to the 2D/CG mix used in the first Monster Strike season.
(Source: MAL, edited)