The Brothers' War

Disciples of Gix | Creature | Phyrexian Human | When Disciples of Gix enters the battlefield, search your library for up to three artifact cards, put them into your graveyard, then shuffle. | Peter Polach

Tyrant of Kher Ridges | Creature | Dragon | Flying When Tyrant of Kher Ridges enters the battlefield, it deals 4 damage to any target. {R}: Tyrant of Kher Ridges gets +1/+0 until end of turn. | Karl Kopinski

Gnarlroot Pallbearer | Creature | Treefolk Druid | Trample When Gnarlroot Pallbearer enters the battlefield, target creature gets +X/+X until end of turn, where X is the number of creature cards in your graveyard. | Nino Is

Sarinth Greatwurm | Creature | Wurm | Trample Whenever a land 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.") | Jesper Ejsing

Steel Seraph | Artifact Creature | Angel | Prototype {1}{W}{W} — 3/3 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) Flying At the beginning of combat on your turn, target creature you control gains your choice of flying, vigilance, or lifelink until end of turn. | Denys Tsiperko

Goring Warplow | Artifact Creature | Construct | Prototype {1}{B} — 1/1 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) Deathtouch | Wayne Reynolds

Cradle Clearcutter | Artifact Creature | Golem | Prototype {2}{G} - 1/3 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) {T}: Add an amount of {G} equal to Cradle Clearcutter's power. | Daarken

Bladecoil Serpent | Artifact Creature | Serpent | When Bladecoil Serpent enters the battlefield, for each {U}{U} spent to cast it, draw a card. When Bladecoil Serpent enters the battlefield, for each {B}{B} spent to cast it, each opponent discards a card. When Bladecoil Serpent enters the battlefield, for each {R}{R} spent to cast it, it gets +1/+0 and gains trample and haste until end of turn. | Joshua Cairos

Argivian Avenger | Artifact Creature | Shapeshifter | {1}: Until end of turn, Argivian Avenger gets -1/-1 and gains your choice of flying, vigilance, deathtouch, or haste. | Milivoj Ćeran

Artificer's Dragon | Artifact Creature | Dragon | Flying {R}: Artifact creatures you control get +1/+0 until end of turn. Unearth {3}{R}{R} ({3}{R}{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.) | Leon Tukker