Pioneer Masters

Akoum Warrior | Creature | Minotaur Warrior | Trample | Karl Kopinski

Akroan Crusader | Creature | Human Soldier | Heroic — Whenever you cast a spell that targets Akroan Crusader, create a 1/1 red Soldier creature token with haste. (It can attack and {T} as soon as it comes under your control.) | Johann Bodin

Bloodfire Enforcers | Creature | Human Monk | Bloodfire Enforcers has first strike and trample as long as an instant card and a sorcery card are in your graveyard. | Yefim Kligerman

Boundary Lands Ranger | Creature | Human Ranger | At the beginning of combat on your turn, if you control a creature with power 4 or greater, you may discard a card. If you do, draw a card. | Pascal Quidault

Ghirapur Gearcrafter | Creature | Human Artificer | When Ghirapur Gearcrafter enters, create a 1/1 colorless Thopter artifact creature token with flying. (A creature with flying can't be blocked except by creatures with flying or reach.) | Victor Adame Minguez

Makindi Sliderunner | Creature | Beast | Trample Landfall — Whenever a land you control enters, Makindi Sliderunner gets +1/+1 until end of turn. | Matt Stewart

Purphoros's Emissary | Enchantment Creature | Ox | Bestow {6}{R} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) Menace (This creature can't be blocked except by two or more creatures.) Enchanted creature gets +3/+3 and has menace. | Sam Burley

Rimrock Knight | Creature | Dwarf Knight | Rimrock Knight can't block. | Chris Rallis

Stoneshock Giant | Creature | Giant | {6}{R}{R}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) When Stoneshock Giant becomes monstrous, creatures without flying your opponents control can't block this turn. | Lars Grant-West

Goblin Heelcutter | Creature | Goblin Berserker | Whenever Goblin Heelcutter attacks, target creature can't block this turn. Dash {2}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.) | Jesper Ejsing

Nivix Cyclops | Creature | Cyclops | Defender Whenever you cast an instant or sorcery spell, Nivix Cyclops gets +3/+0 until end of turn and can attack this turn as though it didn't have defender. | Wayne Reynolds

Zendikar Incarnate | Creature | Elemental | Zendikar Incarnate's power is equal to the number of lands you control. | Lucas Graciano