Rock, Paper Scissors 15?!

ROCK POUNDS OUT
FIRE, CRUSHES SCISSORS, SNAKE,
HUMAN,
WOLF, SPONGE, BLOCKS (GROWTH OF) TREE.

FIRE MELTS SCISSORS,
BURNS PAPER, SNAKE, HUMAN,
TREE, WOLF & SPONGE.

SCISSORS SWISH THROUGH AIR, CARVE TREE,
CUT PAPER, SNAKE, HUMAN,
WOLF & SPONGE.

SNAKE BITES HUMAN & WOLF,
SWALLOWS SPONGE, NESTS IN TREE & PAPER,
BREATHES AIR, DRINKS WATER.

HUMAN PLANTS TREE, TAMES WOLF,
CLEANS WITH SPONGE,
WRITES PAPER, BREATHES
AIR, DRINKS WATER, SLAYS DRAGON.

TREE SHELTERS WOLF & DRAGON, OUTLIVES SPONGE,
BECOMES PAPER, PRODUCES AIR, DRINKS WATER,
IMPRISONS DEVIL.

WOLF CHEWS UP SPONGE,
& PAPER, BREATHES
AIR, DRINKS WATER, OUTRUNS DRAGON & LIGHTNING,
BITES DEVIL's HEINY.

SPONGE SOAKS PAPER, USES
AIR POCKETS, ABSORBS WATER, CLEANSES DEVIL & DRAGON,
CLEANS GUN, CONDUCTS LIGHTNING.

PAPER FANS AIR,
COVERS ROCK, FLOATS ON WATER, REBUKES DEVIL & DRAGON,
OUTLAWS GUN, DEFINES LIGHTNING.

AIR BLOWS OUT FIRE,
ERODES ROCK, EVAPORATES WATER, CHOKES DEVIL,
TARNISHES GUN, FREEZES DRAGON, CREATES LIGHTNING.

WATER DROWNS DEVIL & DRAGON, ERODES ROCK, PUTS OUT
FIRE, RUSTS SCISSORS & GUN,
CONDUCTS LIGHTNING.

DRAGON COMMANDS DEVIL, BREATHES LIGHTNING &
FIRE, RESTS ON ROCK, IMMUNE TO SCISSORS &
GUN, SPAWNS SNAKE.

DEVIL HURLS ROCK, BREATHS
FIRE, IMMUNE TO SCISSORS & GUN, CASTS LIGHTNING,
EATS SNAKES, POSSESSES HUMAN.

LIGHTNING MELTS GUN & SCISSORS,
SPLITS ROCK & TREE, STARTS FIRE,
STRIKES SNAKE & HUMAN.

GUN TARGETS ROCK & TREE,
FIRES, OUTCLASSES SCISSORS,
SHOOTS SNAKE, HUMAN & WOLF.

Each gesture beats out seven others, and is beaten by the remaining seven.

...SO...will there ever be an RPS-17 and beyond? Maybe it's up to YOU...