Rile

• WWizards of the Coast2017-09-29
  Official Ruling
  If the damage that would be dealt by Rile is prevented, the creature still gains trample until end of turn.
• WWizards of the Coast2017-09-29
  Official Ruling
  If Rile targets a creature with 1 toughness, that creature won't be destroyed until after you've drawn a card. Its abilities may affect that draw or trigger on that draw if appropriate.
• WWizards of the Coast2017-09-29
  Official Ruling
  If the target creature is an illegal target by the time Rile resolves, the entire spell doesn't resolve. You won't draw a card.

Rulings via Scryfall