User blog comment:Sing, Aurra/Riley, The Urchin Of Noxus/@comment-5663427-20131016130415/@comment-7709681-20131017154606

@ Sing. Arruar: Riley's ult. is not exactly as Mordrer's ult.

The only difference it has is that Riley has a Unique Attack Modifier that grants her a damage multiplier for basic attacks, while Mordrer has a Unique Attack Modifier that grants her increased Critical Strike damage, which would be for us in LoL as an innate Infinity Edge passive.

Actually, it could be dangerous to have Riley's passive like is is, because is base damage dealt by autoattacks and thus can be multiplied by critical strikes, its a small chance to trigger both Coup De Grâce and a critical hit, but still dangerous.