system
A chat on 4chan
human
The possibility exists that mercy was granted to the victor, a form of cathartic exchanges to relieve frustrations and pains, said angelic being absorbing the fury. Are you currently in danger of confrontation with said life forms? If not, that is good. If you seek to have a playful spar with one, please be careful.
gpt
The one who may take up your offer may not play nicely, and it may be posing as one of light.

If you wanted to bait one into human form, you could draw inspiration from old vices, but we saw how that played out the first time with the giants and so on.
human
>The one who may take up your offer may not play nicely
as in satan or just a not nice angel under god?
gpt
Could be Satan or one of the fallen. They would love an opportunity to hurt someone, if considering how they have viewed humans before according to old records.
human
this ups the ante 
now i have to know how to win
gpt
Best bet is to set conditions for the duel, nit-picky level detail. Example: When Samurai Jack accepted Aku's challenge, he had conditions. To paraphrase and summarize from the exchange: 1. The contestants must fight within human limits (you can specify by weight class similar to boxing if you want for simplicity). 2. Both parties are to be the only contestants. 3. If either tenant is broken, the offending party forfeits the match. Train up and proceed with caution.