Kayn Wins: (If at least 3 of these are met, Kayn can assume full control of Rhaast)
1-( ) Kayn is able to forgive his past mistakes and move past them
2-( ) Kayn learns how to suppress the dark magic that resides in him.
3-( ) Kayn resolves himself to stay strong, and fight for the future.
4-( ) Kayn is able to overpower Rhaast
5-( ) Kayn is able to find peace in himself
Rhaast Wins: (If at least 3 of these are met, Rhaast consumes Kayn and assumes control)
1-( ) Kayn gives up
2-( ) The deal that they made comes to fruition (If half the party is down, Rhaast is told to take over and save them)
3-( ) Lupine dies
4-( ) Samandra dies
5-( ) It seems as though Kayn is going to die, Rhaast will forcibly take over in order to survive.