If you are doing candle magic, watch for omens that may predict the success of your spell:
Tall, strong flame - your spell is empowered and getting through, it will work very well
Flickering, unsteady flame - your spell is having trouble manifesting your results
Dancing, wild flame - get ready for the roller coaster ride
Normal flame - things are working as expected
Small, blue flame - your spell is not getting through, prepare a backup plan
Crackling, popping flame - your spell may manifest in very unexpected ways