Kayla's Music Box
Legendary Artifact
, 
: Look at the top card of your library, then exile it face down. (You may look at it any time.)
: Until end of turn, you may play cards you own exiled with Kayla's Music Box.
Aaron Miller
Magic Online Promos (PRM)
• #105832Rulings
No other player may look at the face-down cards you own exiled with Kayla’s Music Box, even if another player takes control of it.
(wotc • 2022-10-14)
Rulings
No other player may look at the face-down cards you own exiled with Kayla’s Music Box, even if another player takes control of it.
(wotc • 2022-10-14)