Nimble Obstructionist

• WOTC Official Reminder Textofficial rules
  Flash — You may cast this spell any time you could cast an instant.
• WOTC Official Reminder Textofficial rules
  Cycling — Cycling [cost] (Pay [cost], discard this card: Draw a card.)

• WWizards of the Coast2017-07-14
  Official Ruling
  Mana abilities can't be targeted. An activated mana ability is one that could add mana as it resolves, doesn't have a target, and isn't a loyalty ability. A triggered mana ability is one that could add mana as it resolves and triggers on an activated mana ability.
• WWizards of the Coast2017-07-14
  Official Ruling
  Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keyword abilities, such as prowess and afflict, are triggered abilities and will have "when," "whenever," or "at" in their reminder text.
• WWizards of the Coast2017-07-14
  Official Ruling
  If you counter a delayed triggered ability that triggers at the beginning of the "next" occurrence of a specified step or phase, that ability won't trigger again the following time that phase or step occurs.
• WWizards of the Coast2017-07-14
  Official Ruling
  Abilities that create replacement effects, such as a permanent entering the battlefield tapped or with counters on it, can't be targeted. Abilities that apply "as [this creature] enters the battlefield" are also replacement effects and can't be targeted.
• WWizards of the Coast2017-07-14
  Official Ruling
  Activated abilities are written in the form "Cost: Effect." Some keyword abilities, such as equip and eternalize, are activated abilities and will have colons in their reminder texts.
• 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.
• 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.

Rulings via Scryfall