Kokoro no Chizu (EB02-050) - Extra Booster: Anime 25th Collection Foil

[Main] Look at 4 cards from the top of your deck; reveal up to 1 card with a cost of 4 or more and add it to your hand. Then, place the rest at the bottom of your deck in any order.
[Trigger] Activate this card's [Main] effect.