2021-02-05 : If you don’t play the card by the end of the turn, it will remain exiled. Boasting again on a future turn won’t let you play that card.

2021-02-05 : Playing a card this way follows the normal rules for playing the card. You must pay its costs, and you must follow all applicable timing rules. For example, if the card is a sorcery card, you can cast it only during your main phase while the stack is empty.

2021-02-05 : The card you exile with the boast ability is exiled face up.

2021-02-05 : Under normal circumstances, you can play a land this way only if you haven’t played a land yet that turn.