This is a very different kind of deck from the others. The theme is to directly manipulate the foodweb to understand how it operates and see what you can make it do. It doesn't matter whether the operations are possible.

Here there are only 4 unique cards, repeated for 15 rounds (left/right card choice). The left card is always Step. The option cards cycle through Add Species, Weather, and Cut Species. The foodweb (simulator) is never stepped unless told to. On each card, you have the option of doing nothing, or close to nothing. You can prune or enrich as many species as you wish, or none. There are no money or popularity effects.

Some experiments: adjust Cat (more, less, none). Wipe out all mesopredators. Wipe out one or two of the plants. Wipe out one or two of the insects. Try to get the system to stand without Rodents, or without Lizards. Remove all but one of the songbirds on the herbivore row. Etc.

See Intro Deck for challenges and foodweb description.