Would it make sense thematically if Skarner had a passive like Bard's?
Skarner's story is of him traveling the world in search of his kin's life crystals, which seems like the perfect excuse to have a "find stuff around the map" passive.
Would also be significantly less tacky than spawning giant rocks around the map. I know the idea is supposed to be "hey, Skarner's the Crystal Scar/Dominion champion, so let's make Dominion his passive", but still...