Bounce effects return opponent's Characters to hand, shrinking the board threats that need defending against
Once you exile a card that meets the discover requirement, you can choose to cast it or put it into your hand, but unless you cant put cards into your hand or cant cast the spell for some reason as the ability is resolving, the card wont remain exiled
Ghost Quarter is my pick here, as itll be able to target any land, even basics, and even your own
Here are all of the cards in the 'Mega Rising Museum 3' Secret Mission: Skiddo #228 (Full Art / One Gold Star) Rillaboom #229 (Full Art / One Gold Star) Chandelure #231 (Full Art / One Gold Star) Ludicolo #233 (Full Art / One Gold Star) Eiscue #236 (Full Art / One Gold Star) Gothita #239 (Full Art / One Gold Star) Goomy #247 (Full Art / One Gold Star) Stoutland #249 (Full Art / One Gold Star) Rewards: 36 Wonder Hourglasses, 12 Pack Hourglasses and 10 Shop Tickets
They were only revealed at Gen Con 2023 coming as a massive surprise when the first booster packs were opened