Guilds of Ravnica

Ledev Guardian | Creature | Human Knight | 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.) | Kimonas Theodossiou

Parhelion Patrol | Creature | Human Knight | Flying, vigilance Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) | Even Amundsen

Hammer Dropper | Creature | Giant Soldier | Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) | Lake Hurwitz

Sumala Woodshaper | Creature | Elf Druid | When Sumala Woodshaper enters the battlefield, look at the top four cards of your library. You may reveal a creature or enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. | Sara Winters