The SERPs & Spyders cards, designs and rules are all under the Creative Commons Attribution-ShareAlike 3.0 Unported Licence.

You can download all the cards from my flickr account: http://goo.gl/XGS9r

You may use the game for commercial purposes, and make adaptations as you wish. All the licence requires is attribution to Jason Comely via a link.

Note: SERPs & Spyders cards/gamepacks can still be purchased at The GameCrafter for those who just want to play: http://goo.gl/15kIG