User blog comment:JmLyan/CB1 Sorcia, the Spellbound/@comment-973379-20150318220128

Buy Muramana(and the seraph.. and then FH and ROA for hp/armor/mana), stay near ally Karthus, ask him to Q all day. PROFIT.

2000(mura+SE)+1300(2 roa)+400(fh)+1260=4960. +1000 or more from passive and so we have 6000 mana..

6000*0.16=960 damage drom 2 sec CD skillshot. From a champ with good armor and 3500 or so HP. And he have other abilities too(noone care about them anyway, but still).

Also that ult could turn Ryze and Ez into URF-level broken muchingun. Taric and Gragas into no-cd-permastun-and-heal and slam-them-in-the-wall respectively. Zyra into instant-forest... You see the point.