Yawgmoth's Will

• WWizards of the Coast2004-10-04
  Official Ruling
  If you play a card using Yawgmoth’s Will and something triggers only when “cast from your hand”, that something will not trigger. Such things trigger based on where the card came from.
• WWizards of the Coast2004-10-04
  Official Ruling
  If you cast a Buyback spell, then there will be two effects trying to replace where the card goes. You get to choose if the Buyback returns the card to your hand or the card gets exiled.
• WWizards of the Coast2004-10-04
  Official Ruling
  The second ability creates a replacement effect. It applies to both costs and effects.
• WWizards of the Coast2004-10-04
  Official Ruling
  It will exile itself since it goes to the graveyard after its effect starts.
• WWizards of the Coast2004-10-04
  Official Ruling
  To “play a card” is to either cast a spell or to put a land onto the battlefield using the main phase special action.
• WWizards of the Coast2004-10-04
  Official Ruling
  If an effect asks you to discard a card, you can’t “discard” something that is in your graveyard. Those cards are not in your hand. Thus, Cycling abilities of cards in the graveyard can’t be activated.
• WWizards of the Coast2006-10-15
  Official Ruling
  You cannot Suspend a card from your graveyard, only your hand.

Rulings via Scryfall