Free to earn means: players do not need to invest any money to play in the game, the only thing they need to commit is time and effort.
So how to do this? When a player starts the game, the system will give the player a normal Angel. Players use this angel to participate in completely free battles.
When the player wins the match, they can claim INC token & ING token when get promoted and be in the top 500.
How are free angels distributed?
When players log into the game for the first time, they will be given a free angel. Players can still use INC token or power points to upgrade those heroes for free normally. The only difference is that free heroes are not eligible for minting and not an NFT so it can't be sold on the marketplace.