Architected by Sky Mavis, a gaming studio from Vietnam, and inspired by Pokemon, Axie Infinity is a "play-to-earn" pet training game and virtual world built on the Ethereum blockchain. Players can collect, breed, battle, and trade in-game pets called Axies. All in-game assets are represented via fungible ERC-20 or non-fungible ERC-721 tokens and thus trade on secondary markets.