here are some possible effects
Fire/Water
Shield abilities switch except for damage prevention on ice shield
fire/ice bolt
creatures with freeze, ablaze instead / creatures with ablaze, freeze instead
brimstone eater produces water instead of fire
Fahrenheit work off water instead of fire.
This is probably to outrageous an idea to work at this point in the game's existence.
I would like to hear other opinions on what all this could possibly do.
Edit: I was just thinking maybe
and
need to be left out of this concept because
/
and
/
effects don't seem to truly oppose one another. The other 8,
/
,
/
,
/
and
/
, do have effects that oppose. Switching The other 8's abilities and effects is far easier to do.