User blog comment:Poisonshark/Custom Champion, Eranus, the Light of Ancient Times/@comment-7709681-20140825235152/@comment-5663427-20140826133559

Don't forget that this 500% of AD is bonus damage (which means, that you apply also additional 100% of your total AD, or 200~250 if it's a crit), and lifesteal works with total damage, not just with bonus. It's like "u wot m9"