All of the Creek Nation casinos in Oklahoma are starting to use a common set of 4 level cards called Creek Nation Connect in Amber, Sapphire, Turquoise and Onyx levels. This includes River Spirit, One Fire, Duck Creek, and Creek Nation Bristow, Checotah, Eufaula, Holdenville, Muskogee and Okemah.

Here's scans of the first 2 levels with a common reverse, if anyone comes across the other levels please submit scans to the ChipGuide