The Brothers' War

Bitter Reunion | Enchantment | | When Bitter Reunion enters the battlefield, you may discard a card. If you do, draw two cards. {1}, Sacrifice Bitter Reunion: Creatures you control gain haste until end of turn. | Jake Murray

Dwarven Forge-Chanter | Creature | Dwarf Wizard | Ward—Pay 2 life. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 2 life.) Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) | Bartlomiej Gawel

Feldon, Ronom Excavator | Legendary Creature | Human Artificer | Haste Feldon, Ronom Excavator can't block. Whenever Feldon is dealt damage, exile that many cards from the top of your library. Choose one of them. Until the end of your next turn, you may play that card. | Howard Lyon

Horned Stoneseeker | Creature | Lizard | Menace When Horned Stoneseeker enters the battlefield, create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") When Horned Stoneseeker leaves the battlefield, sacrifice a Powerstone. | Eric Velhagen

Mishra's Domination | Enchantment | Aura | Enchant creature As long as you control enchanted creature, it gets +2/+2. Otherwise, it can't block. | Fajareka Setiawan

Obliterating Bolt | Sorcery | | Obliterating Bolt deals 4 damage to target creature or planeswalker. If that creature or planeswalker would die this turn, exile it instead. | Campbell White

Roc Hunter | Creature | Human Soldier | Reach | Ina Wong

Sardian Cliffstomper | Creature | Minotaur Barbarian | As long as it's your turn and you control four or more Mountains, Sardian Cliffstomper gets +X/+0, where X is the number of Mountains you control. | Joseph Weston

Whirling Strike | Instant | | Target creature gets +2/+0 and gains first strike and trample until end of turn. | Aaron J. Riley

Third Path Iconoclast | Creature | Human Monk | Whenever you cast a noncreature spell, create a 1/1 colorless Soldier artifact creature token. | Manuel Castañón

Hajar, Loyal Bodyguard | Legendary Creature | Human Soldier | Sacrifice Hajar, Loyal Bodyguard: Legendary creatures you control get +1/+0 and gain indestructible until end of turn. | Joshua Raphael

Scrapwork Mutt | Artifact Creature | Dog | When Scrapwork Mutt enters the battlefield, you may discard a card. If you do, draw a card. Unearth {1}{R} ({1}{R}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.) | Sidharth Chaturvedi