User blog comment:IE2555/A discovery on the Official Website.../@comment-11616642-20140212223041

Ryze fights evil magic and Brand is a total asshole made of fire

Sivir and Nasus fought on the same side during the Shurima showdown after Cass hired her to trasure hunt

Opposing them were Renekton and Xerath(And Cass)

The whole Rivals/friends thing is weird to me too... Some of it seems to relate to events not covered by lore(!)