I had the idea that the reason why Pike is weilding Mythcarver is because She and Scanlan got sucked into the spinning orb (or maybe Scanlan followed Pike into the orb after her major crash-out/break-down/turn-heel) and now they're doing their version of the "Secret Tunnel" bit from Avatar
Ok sorry this is a bit late but I was thinking something along the lines of Scanlan giving Mythcarver to Pike when they go in BUT I just saw the recent teaser they released with Pike’s lil flashback so I think where they might be going with Pike’s blood thing is that she’s related to the champion that originally wielded Mythcarver (because the old champion looks an awful lot like Pike👀).

















