The Brothers' War

Great Desert Prospector | Creature | Human Artificer | When Great Desert Prospector enters the battlefield, create a tapped Powerstone token for each other creature you control. (The tokens are artifacts with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") | Nestor Ossandon Leal

Loran, Disciple of History | Legendary Creature | Human Artificer | Whenever Loran, Disciple of History or another legendary creature enters the battlefield under your control, return target artifact card from your graveyard to your hand. | Cristi Balanescu

Recruitment Officer | Creature | Human Soldier | {3}{W}: Look at the top four cards of your library. You may reveal a creature card with mana value 3 or less from among them and put it into your hand. Put the rest on the bottom of your library in a random order. | Johan Grenier

Thopter Architect | Creature | Human Artificer | Whenever an artifact enters the battlefield under your control, target creature gains flying until end of turn. | Michal Ivan

Yotian Tactician | Creature | Human Soldier | Other Soldiers you control get +1/+1. | Fariba Khamseh

Hero of the Dunes | Creature | Human Soldier | When Hero of the Dunes enters the battlefield, return target artifact or creature card with mana value 3 or less from your graveyard to the battlefield. Creatures you control with mana value 3 or less get +1/+0. | Taras Susak

Fallaji Vanguard | Creature | Human Soldier | First strike Whenever Fallaji Vanguard or another creature enters the battlefield under your control, target creature gets +2/+0 until end of turn. | Joshua Cairos

Yotian Dissident | Creature | Human Artificer | Whenever an artifact enters the battlefield under your control, put a +1/+1 counter on target creature you control. | Steve Prescott

Combat Thresher | Artifact Creature | Construct | Prototype {2}{W} — 1/1 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) Double strike When Combat Thresher enters the battlefield, draw a card. | Victor Harmatiuk

Yotian Frontliner | Artifact Creature | Soldier | Whenever Yotian Frontliner attacks, another target creature you control gets +1/+1 until end of turn. Unearth {W} ({W}: 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.) | Jehan Choo