"Magic 2015 Core Set", +=0 (13)
When you cast this spell, reveal the top X cards of your library. You may put a nonland permanent card with mana value X or less from among them onto the battlefield. Then shuffle the rest into your library.
Genesis Hydra enters with X +1/+1 counters on it.
Defender (This creature can't attack.)
Whenever Hornet Nest is dealt damage, create that many 1/1 green Insect creature tokens with flying and deathtouch. (Any amount of damage a creature with deathtouch deals to a creature is enough to destroy it.)
Kalonian Twingrove's power and toughness are each equal to the number of Forests you control.
When Kalonian Twingrove enters, create a green Treefolk Warrior creature token with "This creature's power and toughness are each equal to the number of Forests you control."
You may have Mercurial Pretender enter as a copy of a creature you control, except it has ": Return this creature to its owner's hand."
Flying (This creature can't be blocked except by creatures with flying or reach.)
Nightmare's power and toughness are each equal to the number of Swamps you control.
Flying
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Seraph of the Masses's power and toughness are each equal to the number of creatures you control.
Undergrowth Scavenger enters with a number of +1/+1 counters on it equal to the number of creature cards in all graveyards.
Whenever Wall of Essence is dealt combat damage, you gain that much life.
: Wall of Fire gets +1/+0 until end of turn.
Defender
Whenever Wall of Frost blocks a creature, that creature doesn't untap during its controller's next untap step.
Whenever you gain life, put a +1/+1 counter on Wall of Limbs.
, Sacrifice Wall of Limbs: Target player loses X life, where X is Wall of Limbs's power.
, Sacrifice a Wall: Draw a card.
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, Sacrifice Wall of Limbs: Target player loses X life, where X is Wall of Limbs's power.