Obelisk of Urd
Casting Cost:
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of that creature's color.)
As Obelisk of Urd enters the battlefield, choose a creature type.
Creatures you control of the chosen type get +2/+2.
$ 000
Ob Nixilis, Unshackled
Flying, trample
Whenever an opponent searches his or her library, that player sacrifices a creature and loses 10 life.
Whenever another creature dies, put a +1/+1 counter on Ob Nixilis, Unshackled.
Ob Nixilis, the Fallen
Landfall — Whenever a land enters the battlefield under your control, you may have target player lose 3 life. If you do, put three +1/+1 counters on Ob Nixilis, the Fallen.
Ob Nixilis Reignited
+1: You draw a card and you lose 1 life.
-3: Destroy target creature.
-8: Target opponent gets an emblem with "Whenever a player draws a card, you lose 2 life."
Oath of Nissa
When Oath of Nissa enters the battlefield, look at the top three cards of your library. You may reveal a creature, land, or planeswalker card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
You may spend mana as though it were mana of any color to cast planeswalker spells.
Oath of Druids
At the beginning of each player's upkeep, that player chooses target player who controls more creatures than he or she does and is his or her opponent. The first player may reveal cards from the top of his or her library until he or she reveals a creature card. If he or she does, that player puts that card onto the battlefield and all other cards revealed this way into his or her graveyard.
Nyxathid
As Nyxathid enters the battlefield, choose an opponent.
Nyxathid gets -1/-1 for each card in the chosen player's hand.
Nylea, God of the Hunt
Indestructible
As long as your devotion to green is less than five, Nylea isn't a creature. (Each in the mana costs of permanents you control counts toward your devotion to green.)
Other creatures you control have trample.
: Target creature gets +2/+2 until end of turn.
Nykthos, Shrine to Nyx
: Add to your mana pool.
, : Choose a color. Add to your mana pool an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)
Nut Collector
At the beginning of your upkeep, you may put a 1/1 green Squirrel creature token onto the battlefield.
Threshold — Squirrel creatures get +2/+2 as long as seven or more cards are in your graveyard.
Null Rod
Activated abilities of artifacts can't be activated.
Noxious Gearhulk
Menace
When Noxious Gearhulk enters the battlefield, you may destroy another target creature. If a creature is destroyed this way, you gain life equal to its toughness.
Nourishing Shoal
You may exile a green card with converted mana cost X from your hand rather than pay Nourishing Shoal's mana cost.
You gain X life.
Norn's Annex
( can be paid with either or 2 life.)
Creatures can't attack you or a planeswalker you control unless their controller pays for each of those creatures.
Norin the Wary
When a player casts a spell or a creature attacks, exile Norin the Wary. Return it to the battlefield under its owner's control at the beginning of the next end step.
Noble Hierarch
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
: Add , , or to your mana pool.
Nissa, Worldwaker
+1: Target land you control becomes a 4/4 Elemental creature with trample. It's still a land.
+1: Untap up to four target Forests.
-7: Search your library for any number of basic land cards, put them onto the battlefield, then shuffle your library. Those lands become 4/4 Elemental creatures with trample. They're still lands.
Nissa, Voice of Zendikar
+1: Put a 0/1 green Plant creature token onto the battlefield.
-2: Put a +1/+1 counter on each creature you control.
-7: You gain X life and draw X cards, where X is the number of lands you control.
Nissa, Vital Force
+1: Untap target land you control. Until your next turn, it becomes a 5/5 Elemental creature with haste. It's still a land.
-3: Return target permanent card from your graveyard to your hand.
-6: You get an emblem with "Whenever a land enters the battlefield under your control, you may draw a card."