Apparently there was a Darkin invasion
Riot Interlocutioner mentioned on Reddit that in the days old, Rhaast and Aatrox used to be like Darkin buddies who part of an invasion of Darkin and were rekting all the bronze noobs of Runeterra, then they overextended and through and got imprisoned in their weapons
If you don't like my interpretation heres his, word for word
>In the dark and mysterious past, Rhaast and Aatrox were wreaking havoc across Runeterra as part of the Darkin invasion. It was all going so well, until it didn't, and they were bound to their weapons. That's the cliffsnotes version of a story coming in the future! Don't make us spoil it!
