void SetUpMagicChain()
{
//must call Active First!
Effect.Active();
//this API only affect 'Gravity Modifier'.
Effect.SetGravityGoal(Target.transform, "line");
}
void SetUpMissile()
{
//must call Active() first!
Effect.Active();
Effect.SetCollisionGoalPos(Target.transform, "soul");
Effect.SetGravityGoal(Target.transform, "soul");
}