The Brothers' War

Scrapwork Cohort | Artifact Creature | Soldier | When Scrapwork Cohort enters the battlefield, create a 1/1 colorless Soldier artifact creature token. Unearth {2}{W} ({2}{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.) | Caio Monteiro

Scrapwork Rager | Artifact Creature | Phyrexian Horror | When Scrapwork Rager enters the battlefield, you draw a card and you lose 1 life. Unearth {3}{B} ({3}{B}: 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.) | Michal Ivan

Clay Champion | Artifact Creature | Construct | Clay Champion enters the battlefield with three +1/+1 counters on it for each {G}{G} spent to cast it. When Clay Champion enters the battlefield, choose up to two other target creatures you control. For each {W}{W} spent to cast Clay Champion, put a +1/+1 counter on each of them. | Leon Tukker

Slagstone Refinery | Artifact | | Whenever Slagstone Refinery or another nontoken artifact you control is put into a graveyard from the battlefield or is put into exile from 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.") | Victor Harmatiuk

Stone Retrieval Unit | Artifact Creature | Construct | When Stone Retrieval Unit 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.) | Andreas Zafiratos

Symmetry Matrix | Artifact | | Whenever a creature with power equal to its toughness enters the battlefield under your control, you may pay {1}. If you do, draw a card. | Slawomir Maniak