This card can add key cards back to the deck so you can Draw them during the next turn.
Discard 1 card from hand, then the card you chose will be place on top of the deck.
Tips, related cards, skills
You can discard a Kidmodo Dragon from your hand and special summon a Dragon, you can also choose to return Kidmodo from your graveyard to the top of your deck to make it reusable.
Monster Reincarnation somehow serves the same purpose as this card, the only difference is Monster Reincarnation return the monster to your hand while Feather return in top of your deck, regardless its a monster or a spell/trap card.
Discards for cost / Returns from your Graveyard to your Deck