Shadow Flare can inflict a Slow effect, and will replace Sacred Soil if it is in effect.
This is important to know. Though generally it's not a game breaker in most cases, the game doesn't really tell you this.

I'm glad to see the numbers run here because I feel Bio is under appreciated. It doesn't seem too powerful at first glance but it adds up so quickly if the DoTs are refreshed efficiently but it gets left to run out so often.