War of the Spark

Arlinn's Wolf | Creature | Wolf | Arlinn's Wolf can't be blocked by creatures with power 2 or less. | Kimonas Theodossiou

Band Together | Instant | | Up to two target creatures you control each deal damage equal to their power to another target creature. | Josh Hass

Courage in Crisis | Sorcery | | Put a +1/+1 counter on target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Micah Epstein

Evolution Sage | Creature | Elf Druid | Landfall — Whenever a land enters the battlefield under your control, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Simon Dominic

Jiang Yanggu, Wildcrafter | Legendary Planeswalker | Yanggu | Each creature you control with a +1/+1 counter on it has "{T}: Add one mana of any color." −1: Put a +1/+1 counter on target creature. | Anna Steinbauer

Kraul Stinger | Creature | Insect Assassin | Deathtouch | Randy Vargas

New Horizons | Enchantment | Aura | Enchant land When New Horizons enters the battlefield, put a +1/+1 counter on target creature you control. Enchanted land has "{T}: Add two mana of any one color." | Eytan Zana

Vivien, Champion of the Wilds | Legendary Planeswalker | Vivien | You may cast creature spells as though they had flash. +1: Until your next turn, up to one target creature gains vigilance and reach. −2: Look at the top three cards of your library. Exile one face down and put the rest on the bottom of your library in any order. For as long as it remains exiled, you may look at that card and you may cast it if it's a creature spell. | Magali Villeneuve

Vivien's Grizzly | Creature | Bear Spirit | {3}{G}: Look at the top card of your library. If it's a creature or planeswalker card, you may reveal it and put it into your hand. If you don't put the card into your hand, put it on the bottom of your library. | Lius Lasahido

Pledge of Unity | Instant | | Put a +1/+1 counter on each creature you control. You gain 1 life for each creature you control. | Chris Rallis

Huatli, the Sun's Heart | Legendary Planeswalker | Huatli | Each creature you control assigns combat damage equal to its toughness rather than its power. −3: You gain life equal to the greatest toughness among creatures you control. | Lius Lasahido

Kiora, Behemoth Beckoner | Legendary Planeswalker | Kiora | Whenever a creature with power 4 or greater enters the battlefield under your control, draw a card. −1: Untap target permanent. | Jaime Jones

Leyline Prowler | Creature | Nightmare Beast | Deathtouch, lifelink {T}: Add one mana of any color. | YW Tang

Domri, Anarch of Bolas | Legendary Planeswalker | Domri | Creatures you control get +1/+0. +1: Add {R} or {G}. Creature spells you cast this turn can't be countered. −2: Target creature you control fights target creature you don't control. | Raymond Swanland

Living Twister | Creature | Elemental | {1}{R}, Discard a land card: Living Twister deals 2 damage to any target. {G}: Return a tapped land you control to its owner's hand. | James Paick

Rubblebelt Rioters | Creature | Human Berserker | Haste Whenever Rubblebelt Rioters attacks, it gets +X/+0 until end of turn, where X is the greatest power among creatures you control. | Tomasz Jedruszek