How to become an Investor in the game?

Everyone becomes an investor (including players with NFT) who has done at least one of the following actions:

Increase the Faction's attack for ETH ("Buy Attack" button):

Revive a dead NFT character (your own or someone else's), click on the button with the image of a first aid kit:

Boost up your character's level up progress:

You can learn more about the mechanics and rewards in the article "Investors":