Bombardment

• WWizards of the Coast2019-11-12
  Official Ruling
  If any portion of your library is randomized, those cards become new objects that aren’t Missiles.
• WWizards of the Coast2019-11-12
  Official Ruling
  If Bombardment is somehow cast while another spell is on the stack, that spell becomes a Missile. Since that spell has no target chosen for its spell ability, it won’t resolve. This is true even if that spell had a target for an ability it had.
• WWizards of the Coast2019-11-12
  Official Ruling
  You must keep cards that were in your hand as Bombardment resolved separate from those that enter your hand later in the turn.
• WWizards of the Coast2019-11-12
  Official Ruling
  The Missile characteristics are copiable values of the affected cards and spells.
• WWizards of the Coast2019-11-12
  Official Ruling
  If a card you own is a Missile and changes zones other than by being cast as a Missile, it stops being a Missile.
• WWizards of the Coast2019-11-12
  Official Ruling
  Cards you own keep any supertypes they may have, such as legendary and basic.

Rulings via Scryfall