Cardinal Red (Solution)

by Derek Kisman, based on an idea by Amos Eshel

Here is an unordered list of answers to the twenty round puzzles, for reference. The colors identify which puzzle answer this is (e.g. DAMP is the answer to the red/green edge cubelet). 
        RYB   SHLEP
        RY    EXTANT
        RYG   DEDITION
        RG    DAMP
        RWG   BOIL
        RW    UNARY
        RWB   CONTIGUOUS
        RB    BASSIST
        YB    SLAUGHTER
        YG    BEER CHUGGING
        WG    EDITH PIAF
        WB    CREAM OF TARTAR
        OYB   ARMORED RECON
        OY    HYPAPANTE
        OYG   COMMEMORATIVE BATS
        OG    DERRICK TRUCK
        OWG   BROWN ROT
        OW    ATTORNEYS GENERAL
        OWB   SACROSANCT
        OB    IMPROMPTU

Using the orientation given in the puzzle page (i.e. the RWB corner is on top), one can use each of the corresponding cardinal directions to replace a single letter in the answer on that cubelet. These replaced letters spell out the answer SLEDDING when read in a circle.

    BASSIST → BASSINET
    SHLEP → SHEEP
    EXTANT → SEXTANT
    DEDITION → SEDITION
    DAMP → SWAMP
    BOIL → BOWL
    UNARY → UNWARY
    CONTIGUOUS → CONTINUOUS