Pioneer Masters

Nissa, Vastwood Seer // Nissa, Sage Animist | Legendary Creature // Legendary Planeswalker | Elf Scout // Nissa | When Nissa enters, you may search your library for a basic Forest card, reveal it, put it into your hand, then shuffle. Whenever a land you control enters, if you control seven or more lands, exile Nissa, then return her to the battlefield transformed under her owner's control. // +1: Reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand. −2: Create Ashaya, the Awoken World, a legendary 4/4 green Elemental creature token. −7: Untap up to six target lands. They become 6/6 Elemental creatures. They're still lands. | Wesley Burt

Whisperwood Elemental | Creature | Elemental | At the beginning of your end step, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.) Sacrifice Whisperwood Elemental: Until end of turn, face-up nontoken creatures you control gain "When this creature dies, manifest the top card of your library." | Raymond Swanland

Nylea, God of the Hunt | Legendary Enchantment Creature | God | Indestructible As long as your devotion to green is less than five, Nylea isn't a creature. (Each {G} in the mana costs of permanents you control counts toward your devotion to green.) Other creatures you control have trample. {3}{G}: Target creature gets +2/+2 until end of turn. | Chris Rahn

Dragonlord Dromoka | Legendary Creature | Elder Dragon | This spell can't be countered. Flying, lifelink Your opponents can't cast spells during your turn. | Eric Deschamps

Karametra, God of Harvests | Legendary Enchantment Creature | God | Indestructible As long as your devotion to green and white is less than seven, Karametra isn't a creature. Whenever you cast a creature spell, you may search your library for a Forest or Plains card, put it onto the battlefield tapped, then shuffle. | Eric Deschamps

Progenitor Mimic | Creature | Shapeshifter | You may have Progenitor Mimic enter as a copy of any creature on the battlefield, except it has "At the beginning of your upkeep, if this creature isn't a token, create a token that's a copy of this creature." | Daarken

Kruphix, God of Horizons | Legendary Enchantment Creature | God | Indestructible As long as your devotion to green and blue is less than seven, Kruphix isn't a creature. You have no maximum hand size. If you would lose unspent mana, that mana becomes colorless instead. | Daarken

Pharika, God of Affliction | Legendary Enchantment Creature | God | Indestructible As long as your devotion to black and green is less than seven, Pharika isn't a creature. {B}{G}: Exile target creature card from a graveyard. Its owner creates a 1/1 black and green Snake enchantment creature token with deathtouch. | Magali Villeneuve

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

Xenagos, God of Revels | Legendary Enchantment Creature | God | Indestructible As long as your devotion to red and green is less than seven, Xenagos isn't a creature. At the beginning of combat on your turn, another target creature you control gains haste and gets +X/+X until end of turn, where X is that creature's power. | Jason Chan