Does Clockwork Keeper's draw effect trigger and go on the chain when you pay the additional cost, or does it happen immediately without providing a reaction window?

Ruling: The card's current functionality is unclear and will be clarified in future rules updates. The development team has not yet decided whether it should be a trigger (requiring errata to add "when" or "at" language) or a non-trigger effect covered by rule 563.1.b.

Nuances:

• As currently worded, it does not meet the technical definition of a trigger (lacks "when" or "at" language)
• If it remains non-triggered, the rules will need to define what category of effect this is
• If it becomes a trigger, the card will receive errata with proper trigger templating
• Until official clarification, judges may need to make rulings on a case-by-case basis