Ravnica Allegiance

Code of Constraint | Instant | | Target creature gets -4/-0 until end of turn. Draw a card. Addendum — If you cast this spell during your main phase, tap that creature and it doesn't untap during its controller's next untap step. | Ekaterina Burmak

Eyes Everywhere | Enchantment | | At the beginning of your upkeep, scry 1. {5}{U}: Exchange control of Eyes Everywhere and target nonland permanent. Activate only as a sorcery. | Nils Hamm

Gateway Sneak | Creature | Vedalken Rogue | Whenever a Gate enters the battlefield under your control, Gateway Sneak can't be blocked this turn. Whenever Gateway Sneak deals combat damage to a player, draw a card. | Matt Stewart

Dovin's Acuity | Enchantment | | When Dovin's Acuity enters the battlefield, you gain 2 life and draw a card. Whenever you cast an instant spell during your main phase, you may return Dovin's Acuity to its owner's hand. | Bastien L. Deharme

High Alert | Enchantment | | Each creature you control assigns combat damage equal to its toughness rather than its power. Creatures you control can attack as though they didn't have defender. {2}{W}{U}: Untap target creature. | Daarken

Gyre Engineer | Creature | Vedalken Wizard | {T}: Add {G}{U}. | Anthony Palumbo