A very nice read, it would be interesting to know what created that spark in the first place.
Useful, quite original. No obvious spelling or grammar mistakes, reads easily. Nicely done, full score.
Here a few typos I found;
Apart form total annihilation of its physical form
Or the players are send to tend the garden of a mage
plant in the heart of the dungeon, nothing can stop it from dieing when it's life cycle comes to an end