User blog comment:Varkarrus/Iva, the Anarchist Fury/@comment-6292556-20140311161938/@comment-3967505-20140311202951

@Erdamon, yes armor is her counter. However, I have ran the numbers, edited them accordingly, and made sure she'd be fine for damage in level 18. Plus she gets armor penetration from her R's passive so it's only a hard counter, not an indestructable one.