User blog comment:RoznosicielCiast/Least popular champions/@comment-4061583-20130124222714

I is a regular Viktor player, and less so Xerath.

I presume you have seen Viktor talk page, but the Viktor players over there tend to be dedicated. I myself definitely like Viktor: Most people think Viktor is UP especially as his passive seals away one item slot. Never mind that the Death Augment turns it into a mini DFG minus its active and CDR.

His second stumbling block is the mechanisms on his Death Ray. Most of my fellow Viktor players absolutely adore this ability (as I do myself), but then it does tend to be a bit of a stumbling block to many as it is difficult to smartcast.

Thirdly his Gravity Field has a crappy range, and I'd say most new Viktor players might have thought it an initator in his combo, even though it generally isn't effective in that field.

As for Xerath, perhaps the fact that his Q is seen by the enemies may be a big factor in him not being popular. He was also probably hit hard by the ult debacle, and despite partial rollback, Xerath's popularity is still down the drain given the huge hit.