Is Rek'Sai, Swarm Queen missing the 'banish it' clause that other cards with similar reveal-and-play effects have, or is it working as intended?

Ruling: Rek'Sai, Swarm Queen is likely missing the 'banish it' clause and may receive errata. The banish clause was added to similar cards to prevent "limbo" states where a card is revealed but cannot be legally played due to choices made during play (like killing your last unit to play Cruel Patron).

Sequence:

• Card is revealed from deck
• Player attempts to play it
• If play becomes illegal due to costs/choices, card needs a known zone to return to
• Banish zone serves this purpose for revealed cards

Nuances:

• The banish zone was introduced specifically to handle cases where units are pending on the chain and need a location while being played
• Without banish, revealed cards in limbo states create ambiguity since the deck is a secret zone
• Rek'Sai's current wording may work in most cases but could have corner case issues similar to Void Rush discussions