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

Hornswoggle | Instant | | Counter target creature spell. You create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") | Deruchenko Alexander

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