The Brothers' War

Draconic Destiny | Enchantment | Aura | Enchant creature Enchanted creature gets +1/+1 and has flying, haste, and "{1}: This creature gets +1/+0 until end of turn." It's a Dragon in addition to its other types. When enchanted creature dies, return Draconic Destiny to its owner's hand. | Justin Hernandez & Alexis Hernandez

Saheeli, Filigree Master | Legendary Planeswalker | Saheeli | +1: Scry 1. You may tap an untapped artifact you control. If you do, draw a card. −2: Create two 1/1 colorless Thopter artifact creature tokens with flying. They gain haste until end of turn. −4: You get an emblem with "Artifact creatures you control get +1/+1" and "Artifact spells you cast cost {1} less to cast." | Aurore Folny

Mishra, Claimed by Gix | Legendary Creature | Phyrexian Human Artificer | Whenever you attack, each opponent loses X life and you gain X life, where X is the number of attacking creatures. If Mishra, Claimed by Gix and a creature named Phyrexian Dragon Engine are attacking, and you both own and control them, exile them, then meld them into Mishra, Lost to Phyrexia. It enters the battlefield tapped and attacking. | Chris Rahn

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

Skitterbeam Battalion | Artifact Creature | Construct | Prototype {3}{R}{R} — 2/2 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) Trample, haste When Skitterbeam Battalion enters the battlefield, if you cast it, create two tokens that are copies of it. | Leon Tukker

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