Starting with a cute cryptokitty, would you like to see how long the cryptoZigzag will become? Hurry up, add your own 721 assets to the head of the snake. Let's make zigzag to the moon! (We're working hard to support more ERC721 assets.)

Emphsis again, the cryptoZigzag snake does not swallow your 721 asset for free, you would get another 721 asset within the snake after you extend the snake body.