Which of the following options would NOT enable the Legion bonus of Vanguard Captain (When you play me, play two 1 [S] Recruit unit tokens here. (Get the effect if you've played another card this turn.))? ✓Play a Vanguard Sergeant BConquering with Kai'sa, Evolutionary, and playing a spell from the trash CHiding a Hidden Blade spell from hand DPlaying a Pakaa Cub from face down

Based on the rules and game concepts of Riftbound, the Legion keyword checks if a player has played another "Main Deck card" earlier in the same turn. According to FAQ #1862, "Recruits and other game pieces are not considered 'cards' for game effect purposes."

Here is the analysis of the options provided:

• A) Play a Vanguard Sergeant: Playing a unit from your hand is playing a Main Deck card. This counts as playing a card for Legion purposes.
• B) Conquering with Kai'sa, Evolutionary, and playing a spell from the trash: Playing a spell as a result of a game effect (like Kai'sa's conquer trigger) counts as playing a card (per Rule 419.3 and Rule 419.4).
• C) Hiding a Hidden Blade spell from hand: According to Rule 811.1.c.2, "Hiding a card does not open a chain" and "Hide is not a subset of Play." Therefore, hiding a card does not count as playing a card for Legion.
• D) Playing a Pakaa Cub from face down: Per Rule 811.1.c.3, "Playing a card from facedown (or 'from Hidden') does open a chain," and FAQ #4541 confirms that "Playing a card from hidden (or from hand) counts as playing a card."

The correct option is C. Hiding a card is a distinct game action that is not considered "playing a card."

Answer: C