EF

Play this Special during Battle, on your turn. Immediately discard any card that cannot be used by the hero playing the card from your hand. These cards can be unplayable due to the hero's inability to use them, the conditions set by an event, or the battle, Refill the same number of cards that were discarded. Duplicate cards drawn at this time may be kept. If this card is played using a DY Special or a CL Special, or anything similar, it affects the hero that played the card that allowed the EF Special to be played. NOTE: This Special is played to take effect and does not count toward the number of cards that is replaced.

Meta Rules
Meta #48 Whenever a Special allows you to draw during the course of the battle, you must discard all drawn cards which are unusable (you may continue to hold any unusables which were unusable prior to the draw).

Meta #49 Whenever a Special allows you to draw during the course of a battle, if it does not indicate whether or not you can keep duplicates, then duplicates must be discarded.

Meta #97 If a Special that indicates it should be "played with" another card is negated, both the Special and the card it was played with are discarded. If a negate is played against a Special indicating that a card should be discarded or exchanged, then the negation takes place prior to the discarding.