Rivals of Ixalan

Admiral's Order | Instant | | Raid — If you attacked this turn, you may pay {U} rather than pay this spell's mana cost. Counter target spell. | Slawomir Maniak

Induced Amnesia | Enchantment | | When Induced Amnesia enters the battlefield, target player exiles all cards from their hand face down, then draws that many cards. When Induced Amnesia is put into a graveyard from the battlefield, return the exiled cards to their owner's hand. | Chris Rallis

Release to the Wind | Instant | | Exile target nonland permanent. For as long as that card remains exiled, its owner may cast it without paying its mana cost. | Joseph Meehan

Protean Raider | Creature | Shapeshifter Pirate | Raid — If you attacked this turn, you may have Protean Raider enter the battlefield as a copy of any creature on the battlefield. | Izzy

Hadana's Climb | Legendary Enchantment | | At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. Then if that creature has three or more +1/+1 counters on it, transform Hadana's Climb. | Titus Lunter