In the same way, you cant pay a cost that requires you to discard a card if you don't have any cards to discard
When the equipped monster is removed from the field and this card is sent to the Graveyard, you can return this card to your hand
While haste is a powerful keyword, in most scenarios it pales in comparison to flying, which provides evasion and can win you the game on the spot if you have a strong-enough board state in play when Wonder hits the yard
Its most comparable to Soul of the Harvest, but at one less mana and with flying instead of trample
There are also a handful of one-off mechanics and keywords that appear on Silverquills students, staff, and spells
They get to play clunky mono-white Lyra Dawnbringer or clunkier still Rodolf Duskbringer or Shilgengar