The roules you find here:
https://kelvsyc.files.wordpress.com/2012/08/r13.pdf (page 117 / 118 setup 2003)

To play this scenario you need:

• the basic game for settler of catan (http://www.thingiverse.com/thing:1238980)
• the seafarers expansion (http://www.thingiverse.com/thing:1393862)
• 3 x aztec-pyramides
• 3 x number tokens

Place the number tokens inside the aztec-pyramides at the beginning of the game. Later on, choose one of the pyramides and take it away so that the number becomes visible.

OTHER SCENARIOS & VARIANTS: http://www.thingiverse.com/thing:1410173

Big thx to all the designers that helped me to build this variant!