Muscle Cavalier is currently unavailable on the US ver.Muscle Cavalier is only available in Nero Festival 2017 Autumn event pickup summon.
For the duration of "Nero Fest 2017 Autumn" event, this craft essence gains the following effects:
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
How to farm EXP cards & level fast
Nightingale
How to farm Pieces & Monuments
Arash
Fate Grand Order Farming Items
Nitocris (Caster)
Noisy Obsession
Ereshkigal
Arthur Pendragon(Prototype)
Gorgon
Black Holy Grail (The Black Grail)