Zara and Caitlyn
Zyra with her molten flowers covers caitlyn traps and are no longer visible in game if placed correctly either allow both to be seen or not allow the traps to be able to be placed directly under the flowers in order to be visible. I don't know if it occurs with all skins but its extremely difficult to play against since your only real defense vs zyra is to walk over her flowers and then to add the caitlyn traps on top that are not visible makes it impossible.