Pioneer Masters

Stormtide Leviathan | Creature | Leviathan | Islandwalk (This creature can't be blocked as long as defending player controls an Island.) All lands are Islands in addition to their other types. Creatures without flying or islandwalk can't attack. | Karl Kopinski

Gurmag Angler | Creature | Zombie Fish | Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) | YW Tang

Abhorrent Overlord | Creature | Demon | Flying When Abhorrent Overlord enters, create a number of 1/1 black Harpy creature tokens with flying equal to your devotion to black. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.) At the beginning of your upkeep, sacrifice a creature. | Slawomir Maniak

Sylvan Primordial | Creature | Avatar | Reach When Sylvan Primordial enters, for each opponent, destroy target noncreature permanent that player controls. For each permanent destroyed this way, search your library for a Forest card and put that card onto the battlefield tapped. Then shuffle. | Stephan Martiniere

Ashen Rider | Creature | Archon | Flying When Ashen Rider enters or dies, exile target permanent. | Chris Rahn

Dragonlord Atarka | Legendary Creature | Elder Dragon | Flying, trample When Dragonlord Atarka enters, it deals 5 damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control. | Karl Kopinski

Gate Colossus | Artifact Creature | Construct | This spell costs {1} less to cast for each Gate you control. This creature can't be blocked by creatures with power 2 or less. Whenever a Gate you control enters, you may put this card from your graveyard on top of your library. | Izzy

Bane of Bala Ged | Creature | Eldrazi | Whenever Bane of Bala Ged attacks, defending player exiles two permanents they control. | Chase Stone

Void Winnower | Creature | Eldrazi | Your opponents can't cast spells with even mana values. (Zero is even.) Your opponents can't block with creatures with even mana values. | Chase Stone