User blog comment:Hidden Sniper/Build Bulwark Every ARAM/@comment-5557556-20130522051638/@comment-4022742-20130523104515

Arguably, Tiamat is quite a lot of sustain, just of the Hp/5 alone. Coupled with the life steal you get when you build it into a hydra, it's gonna be the biggest sustain item you get all game.