Which abilities from a set of 5 cards would proc Consult the Past (i.e., create a priority window for the opponent to play it from hidden)?

Ruling: Clockwork Firstmate and Pookie (Pit Rookie) would proc Consult the Past by creating priority windows for the opponent.

Nuances:

• Clockwork Firstmate only triggers if you pay the cost
• Clockwork Firstmate's ability doesn't enter the chain if there are no other units besides itself on the board
• There's limited harm in not having an activation window for Consult the Past, as you can play it for free on your next turn at any time anyway
• Blue Viktor could be activated to make a token, which would also create a priority window