User blog comment:JmLyan/CC4: Xasus, the Ancient Memory/@comment-24377865-20140703170857/@comment-7481207-20140703181513

Seems you forgot the fact that the passive stacks indefinitely, so it would be 80 damage per spell cast, which with low cooldowns can rump up pretty fast. Also, knowing where your memories are what the E is for (hence its low damage).