Lord Jyscal Guado

• WOTC Official Reminder Textofficial rules
  Investigate — Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card."

• WWizards of the Coast2025-06-06
  Official Ruling
  Lord Jyscal Guado's last ability checks at the moment it would trigger to see if you put a counter on a creature this turn. If you didn't, the ability won't trigger at all. Once your end step begins, it's too late to put a counter on a creature in order to cause this ability to trigger.

Rulings via Scryfall