By giving PROT to your Armz, you have the possibility to improve its power and therefore its win rate.
You can do this 3 times per Armz.
5% more win rate each time, for a maximum of 15% in total.
The cost in PROT varies depending on the rarity of the Armz being fed:
Common: $20 in PROT
Rare: $30 in PROT
Epic: $40 in PROT
Legendary: $50 in PROT
On top of that, 0.05 BNB is added as fee (see Tokenomics for more information)
And 50% of these fees will be used to buyback PROT and fulfil the contract that handles fights rewards.