Yineth and Yangeth

They are powerful rulers from opposite realities, polar opposites of themselves. One is the most powerful healer in her universe the other is the most powerful battle mage in her universe. Evil is spreading through the mid- realm and soon will destroy the connection, destroying all three universal realities. They are pull into mid-realm to stop the spread of evil and halt the destruction. What role do you play in this madness? Did you summon their aid? Did you summon them to destroy them?