Decree of Justice

• WOTC Official Reminder Textofficial rules
  Cycling — Cycling [cost] (Pay [cost], discard this card: Draw a card.)

• WWizards of the Coast2018-03-16
  Official Ruling
  A mana cost of means that you pay twice X. If you want X to be 3, you pay to cast Decree of Justice.
• WWizards of the Coast2022-12-08
  Official Ruling
  The cycling ability and the triggered ability are separate. If the triggered ability doesn't resolve (because, for example, it has been countered, or all of its targets have become illegal), the cycling ability will still resolve, and you'll draw a card.
• WWizards of the Coast2022-12-08
  Official Ruling
  When you cycle this card, first the cycling ability goes on the stack, then the triggered ability goes on the stack on top of it. The triggered ability will resolve before you draw a card from the cycling ability.

Rulings via Scryfall