Courtesy of the official twitter.
Mirror Force Launcher
(1) Once per turn, during your Main Phase: You can discard 1 monster; add 1 “Mirror Force” from your Deck or GY to your hand.
(2) If this Set card is destroyed by an opponent’s card effect and sent to the GY: You can take this card from the GY and 1 “Mirror Force” from your hand, Deck, or GY, and Set them to your field. The cards Set by this effect can be activated during the turn they are Set.