These items usually lead to 1000 bonus health, give or take. Which will make you end up with 3000-3500, somewhere in that range. Along with that, they give you close to maximum on your cooldowns allowing for spam of abilities. Which will make you the ultimate caster. A lot of you did not realize, that "Will of The Acients" Unique Passive, does stack with "Hextech Revolver". This is why I get both. Although I do sell the Revolver late game for more useful items. You may also want a second "Rabadon's Deathcap" instead of a "Deathfire Grasp", I use it for the cooldown reduction. Rylai's is there for the passive, giving you health which is bonus ability power, and ability power which is bonus health. Along with that, your "Sanguine Pool" will slow more, and you "Transfusion" slow stopping a lot of chasing on you as you can cast while they are chasing to get health and slow them.