Spoiler: Red Fel's generatorNeoPhoenix0 participates in the Holy Grail War of Osaka as the master of Berserker
The Servants participating in this war are:
Saber:Altera
Archer:Tristan
Lancer:Jaguarman
Rider:Saint Martha
Caster:Helena Blavatsky
Assassin:Dr. Jekyll
Berserker:Ares
Extra class:None
someone correct me if i am wrong, but it is pretty much impossible to summon a divine servant without the mooncell right? or was there some other servant who used Ares as a nickname.