mtg two sided cards Mechanic Spotlight: Modal Double-Faced How do double sided cards

Hakka, Whispering Raven might let you scry 2 when it hits an opponent, but it also bounces to your hand so you'll likely only get to do that every other turn at best

Other permanents with kicker will have enters-the-battlefield triggered abilities that trigger only if they're kicked

711.2a In every zone other than the battlefield, and also on the battlefield with its front face up, a double-faced card has only the characteristics of its front face

It's a nice flip, and it makes all those unplayable gain life cards from Limited playable, and that's a great positive

711.9a If a checklist card is used, the double-faced card it represents must be set aside prior to the beginning of the game (see rule 103.1a) and must be available throughout the game

Filling the gap is the wildly popular Universes Beyond initiative, which will get three sets of its own for a total of six each year