Ravnica Allegiance

Azorius Skyguard | Creature | Human Knight | Flying, first strike Creatures your opponents control get -1/-0. | Gabor Szikszai

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

Senate Guildmage | Creature | Human Wizard | {W}, {T}: You gain 2 life. {U}, {T}: Draw a card, then discard a card. | G-host Lee

Sphinx of New Prahv | Creature | Sphinx | Flying, vigilance Spells your opponents cast that target Sphinx of New Prahv cost {2} more to cast. | Sara Winters

Depose | Instant | | Tap target creature. Draw a card. | Sara Winters

Sphinx of the Guildpact | Artifact Creature | Sphinx | Sphinx of the Guildpact is all colors. Flying Hexproof from monocolored (This creature can't be the target of monocolored spells or abilities your opponents control.) | Milivoj Ćeran