The Brothers' War

Air Marshal | Creature | Human Soldier | {3}: Target Soldier gains flying until end of turn. | Johan Grenier

Drafna, Founder of Lat-Nam | Legendary Creature | Human Artificer Advisor | {1}{U}: Return target artifact you control to its owner's hand. {3}, {T}: Copy target artifact spell you control. (The copy becomes a token.) | Lie Setiawan

Fallaji Archaeologist | Creature | Human Scout | When Fallaji Archaeologist enters the battlefield, mill three cards. You may put a noncreature, nonland card from among the cards milled this way into your hand. If you don't, put a +1/+1 counter on Fallaji Archaeologist. (To mill a card, put the top card of your library into your graveyard.) | Caroline Gariba

Thopter Mechanic | Creature | Human Artificer | Whenever you draw your second card each turn, put a +1/+1 counter on Thopter Mechanic. When Thopter Mechanic dies, create a 1/1 colorless Thopter artifact creature token with flying. | Joshua Raphael

Zephyr Sentinel | Creature | Human Soldier | Flash Flying When Zephyr Sentinel enters the battlefield, return up to one other target creature you control to its owner's hand. If it was a Soldier, put a +1/+1 counter on Zephyr Sentinel. | Inkognit

Harbin, Vanguard Aviator | Legendary Creature | Human Soldier | Flying Whenever you attack with five or more Soldiers, creatures you control get +1/+1 and gain flying until end of turn. | Kieran Yanner

Evangel of Synthesis | Creature | Phyrexian Human Cleric | When Evangel of Synthesis enters the battlefield, draw a card, then discard a card. As long as you've drawn two or more cards this turn, Evangel of Synthesis gets +1/+0 and has menace. | Denman Rooke

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

Surge Engine | Artifact Creature | Construct | Defender {U}: Surge Engine loses defender and gains "This creature can't be blocked." {2}{U}: Surge Engine becomes blue and has base power and toughness 5/4. Activate only if Surge Engine doesn't have defender. {4}{U}{U}: Draw three cards. Activate only if Surge Engine is blue and only once. | Daarken