Guilds of Ravnica

Centaur Peacemaker | Creature | Centaur Cleric | When Centaur Peacemaker enters the battlefield, each player gains 4 life. | Raoul Vitale

Knight of Autumn | Creature | Dryad Knight | When Knight of Autumn enters the battlefield, choose one — • Put two +1/+1 counters on Knight of Autumn. • Destroy target artifact or enchantment. • You gain 4 life. | Ryan Pancoast

Ledev Champion | Creature | Elf Knight | Whenever Ledev Champion attacks, you may tap any number of untapped creatures you control. Ledev Champion gets +1/+1 until end of turn for each creature tapped this way. {3}{G}{W}: Create a 1/1 white Soldier creature token with lifelink. | Daarken

March of the Multitudes | Instant | | Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Create X 1/1 white Soldier creature tokens with lifelink. | Zack Stella

Selesnya Locket | Artifact | | {T}: Add {G} or {W}. {G/W}{G/W}{G/W}{G/W}, {T}, Sacrifice Selesnya Locket: Draw two cards. | Winona Nelson