Hitting an enemy with Conflagrate increases all Shadow damage you deal by 2/4/6/8/10% for 20 sec, and hitting an enemy with Shadowburn increases all Fire damage you deal by 2/4/6/8/10% for 20 sec. In addition, Conflagrate has a 20/40/60/80/100% chance not to consume Immolate, and Shadowburn has a 20/40/60/80/100% chance to instantly refund a Soul Shard.