Ravnica Allegiance

Clamor Shaman | Creature | Goblin Shaman | Riot (This creature enters the battlefield with your choice of a +1/+1 counter or haste.) Whenever Clamor Shaman attacks, target creature an opponent controls can't block this turn. | Tomasz Jedruszek

Gates Ablaze | Sorcery | | Gates Ablaze deals X damage to each creature, where X is the number of Gates you control. | Eytan Zana

Light Up the Stage | Sorcery | | Spectacle {R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) Exile the top two cards of your library. Until the end of your next turn, you may play those cards. | Dmitry Burmak

Hackrobat | Creature | Human Rogue | Spectacle {B}{R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) {B}: Hackrobat gains deathtouch until end of turn. {R}: Hackrobat gets +2/-2 until end of turn. | Simon Dominic

Rhythm of the Wild | Enchantment | | Creature spells you control can't be countered. Nontoken creatures you control have riot. (They enter the battlefield with your choice of a +1/+1 counter or haste.) | Tomasz Jedruszek