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

Repair and Recharge | Sorcery | | Return target artifact, enchantment, or planeswalker card from your graveyard to 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.") | Ben Wootten

Flow of Knowledge | Instant | | Draw a card for each Island you control, then discard two cards. | Tuan Duong Chu

Keeper of the Cadence | Creature | Human Wizard | {3}: Put target artifact, instant, or sorcery card from a graveyard on the bottom of its owner's library. | Alix Branwyn

No One Left Behind | Sorcery | | This spell costs {3} less to cast if it targets a creature card with mana value 3 or less. Return target creature card from your graveyard to the battlefield. | Chris Cold

Fallaji Excavation | Sorcery | | Create three tapped Powerstone tokens. You gain 3 life. (The tokens are artifacts with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") | Eilene Cherie

Gaea's Courser | Creature | Centaur Soldier | Whenever Gaea's Courser attacks, if there are three or more creature cards in your graveyard, draw a card. | Michele Giorgi

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

Steel Exemplar | Artifact Creature | Wizard | Trample Steel Exemplar enters the battlefield with two +1/+1 counters on it unless two or more colors of mana were spent to cast it. | Kekai Kotaki