
Ajani's Pridemate | Creature | Cat Soldier | Whenever you gain life, put a +1/+1 counter on Ajani's Pridemate. | Svetlin Velinov

Battle Mastery | Enchantment | Aura | Enchant creature
Enchanted creature has double strike. (It deals both first-strike and regular combat damage.) | Zoltan Boros & Gabor Szikszai

Boonweaver Giant | Creature | Giant Monk | When Boonweaver Giant enters the battlefield, you may search your graveyard, hand, and/or library for an Aura card and put it onto the battlefield attached to Boonweaver Giant. If you search your library this way, shuffle. | Adam Paquette

Congregate | Instant | | Target player gains 2 life for each creature on the battlefield. | Mark Zug

Constricting Sliver | Creature | Sliver | Sliver creatures you control have "When this creature enters the battlefield, you may exile target creature an opponent controls until this creature leaves the battlefield." | Karl Kopinski

Dauntless River Marshal | Creature | Human Soldier | Dauntless River Marshal gets +1/+1 as long as you control an Island.
{3}{U}: Tap target creature. | Mark Winters

Devouring Light | 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.)
Exile target attacking or blocking creature. | Slawomir Maniak

First Response | Enchantment | | At the beginning of each upkeep, if you lost life last turn, create a 1/1 white Soldier creature token. | Slawomir Maniak

Geist of the Moors | Creature | Spirit | Flying | Aaron Miller

Paragon of New Dawns | Creature | Human Soldier | Other white creatures you control get +1/+1.
{W}, {T}: Another target white creature you control gains vigilance until end of turn. (Attacking doesn't cause it to tap.) | John Stanko

Seraph of the Masses | Creature | Angel | 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.)
Flying
Seraph of the Masses's power and toughness are each equal to the number of creatures you control. | Zoltan Boros

Wall of Essence | Creature | Wall | Defender (This creature can't attack.)
Whenever Wall of Essence is dealt combat damage, you gain that much life. | Adam Rex

Warden of the Beyond | Creature | Human Wizard | Vigilance (Attacking doesn't cause this creature to tap.)
Warden of the Beyond gets +2/+2 as long as an opponent owns a card in exile. | Raymond Swanland

Sunblade Elf | Creature | Elf Warrior | Sunblade Elf gets +1/+1 as long as you control a Plains.
{4}{W}: Creatures you control get +1/+1 until end of turn. | Lucas Graciano