To use your hero NFT, you will need to do a few things on the Pixel War website:
Connecting Pixel War to Twitter and Discord
Connect to Discord:
Clicking Sign in with Discord will send you to Discord to authenticate.
Connect to Twitter
Follow the same steps, but it will be a Twitter authorization screen.
Set Default Hero
IMPORTANT: To set your default hero, that hero must claim its initial items. A naked hero cannot be set as a default hero (and therefore cannot be used on Discord.)
To select a default hero click on it and then sign the setting to confirm.