как на арене воевать с врагами а не с людьми

[Толян]

both in the arena to fight with the enemy and not with people

[Kovi]

I'm afraid that both Google and Bing Translator fails to translate the Russian text properly which means that I'm not sure about your question. But if you would like to fight against other types of enemies in the Arena then I'm afraid that such thing is not possible. It has been years since I played Numen for the last time, but if I recall it correctly the main purpose of the Arena fights is for you to please your god in "official" tournaments that are announced by the sound of horn from time to time. In these fights, only human champions of all gods fight against each other which is why there are only human opponents available for the training fights, as well.