I was trying out the Decktet + Icehouse game Dectana, but I found the rules a bit hard to keep straight. So I made this cheatsheet out of some other player aids.
By M. C. DeMarco; you may be interested in my other Decktet games.
Dectana is a 2--5 player Decktet game by Ryan Hackel; full rules are available at his site.
Dectana is a direct descendant of John Cooper's classic Icehouse game, Zarcana, and of Zarcana's reimplementation as Gnostica by John Cooper, Jacob Davenport, Kory Heath, and Kristin Matherly. The Decktet is the creation of P.D. Magnus. Looney Pyramids are the creation of John Cooper and Andy Looney. See the cheatsheet itself for more credits and links.
The suit images are from cards released under a Creative Commons License by P.D. Magnus. The background texture is "Skulls" by Adam, from Subtle Patterns.