This is largely due to the secondary market, which is what we call anything and anywhere that sells singles instead of just MTG packs
Id only put this instant in decks that utilize the discard element
That points to a short list: rare vintage cards, graded Alpha, Beta, and Unlimited printings, signed cards, misprints, artist proofs, serialized cards, and full collections where the value is hard to total
Oonas Veiled Regent: Faerie Noble and Legendary Creature, use this card to exile cards from an opponent's library each time you cast a spell on their turn
The good news is that Yunas Whistle should be powerful in a variety of different decks, regardless of how much you cater to it
Whenever a time counter is removed from this card while its exiled, draw a card