Alhammarret, High Arbiter | Legendary Creature | Sphinx | Flying
As Alhammarret, High Arbiter enters the battlefield, each opponent reveals their hand. You choose the name of a nonland card revealed this way.
Your opponents can't cast spells with the chosen name (as long as this creature is on the battlefield). | Richard Wright
Displacement Wave | Sorcery | | Return all nonland permanents with mana value X or less to their owners' hands. | Seb McKinnon
Harbinger of the Tides | Creature | Merfolk Wizard | You may cast Harbinger of the Tides as though it had flash if you pay {2} more to cast it. (You may cast it any time you could cast an instant.)
When Harbinger of the Tides enters the battlefield, you may return target tapped creature an opponent controls to its owner's hand. | Svetlin Velinov
Jace's Sanctum | Enchantment | | Instant and sorcery spells you cast cost {1} less to cast.
Whenever you cast an instant or sorcery spell, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) | Adam Paquette
Mizzium Meddler | Creature | Vedalken Wizard | Flash (You may cast this spell any time you could cast an instant.)
When Mizzium Meddler enters the battlefield, you may change a target of target spell or ability to Mizzium Meddler. | Johann Bodin
Soulblade Djinn | Creature | Djinn | Flying
Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn. | Viktor Titov
Talent of the Telepath | Sorcery | | Target opponent reveals the top seven cards of their library. You may cast an instant or sorcery spell from among them without paying its mana cost. Then that player puts the rest into their graveyard.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you may cast up to two instant and/or sorcery spells from among the revealed cards instead of one. | Peter Mohrbacher
Thopter Spy Network | Enchantment | | At the beginning of your upkeep, if you control an artifact, create a 1/1 colorless Thopter artifact creature token with flying.
Whenever one or more artifact creatures you control deal combat damage to a player, draw a card. | Jung Park
Willbreaker | Creature | Human Wizard | Whenever a creature an opponent controls becomes the target of a spell or ability you control, gain control of that creature for as long as you control Willbreaker. | Dan Scott
Shivan Reef | Land | | {T}: Add {C}.
{T}: Add {U} or {R}. Shivan Reef deals 1 damage to you. | Rob Alexander
Yavimaya Coast | Land | | {T}: Add {C}.
{T}: Add {G} or {U}. Yavimaya Coast deals 1 damage to you. | Anthony S. Waters