At the beginning of your upkeep, you may create a 1/1 green Squirrel creature token.

Threshold — All Squirrels get +2/+2 as long as seven or more cards are in your graveyard.

: Add .

, : Choose a color. Add 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.)

Indestructible

As long as your devotion to green is less than five, Nylea isn't a creature.

Creature spells you cast cost less to cast.

: Reveal the top card of your library. If it's a creature card, put it into your hand. Otherwise, you may put it into your graveyard.

When Nylea's Disciple enters the battlefield, you gain life equal to your devotion to green. (Each in the mana costs of permanents you control counts toward your devotion to green.)

Trample

Other creatures you control have trample.

Choose one —

• Search your library for up to X land cards, reveal them, put them into your hand, then shuffle.

• Nylea's Intervention deals twice X damage to each creature with flying.

Flash

Flying

Whenever you cast your first spell during each opponent's turn, look at the top two cards of your library. Put one of those cards into your hand and the other into your graveyard.

At the beginning of combat on your turn, target enchanted creature or enchantment creature you control gets +1/+1 and gains trample until end of turn.

Nyx Lotus enters the battlefield tapped.

: Choose a color. Add 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.)

As Nyxathid enters the battlefield, choose an opponent.

Nyxathid gets -1/-1 for each card in the chosen player's hand.

This spell costs less to cast, where X is the total mana value of noncreature enchantments you control.

Trample

, Sacrifice another enchantment: Nyxborn Behemoth gains indestructible until end of turn.

Bestow (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.)

Enchanted creature gets +2/+1.

Bestow (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.)

Enchanted creature gets +1/+1.

Bestow (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.)

Enchanted creature gets +1/+2.

Bestow (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.)

Enchanted creature gets +3/+1.

As long as it's not your turn, tapped creatures you control have hexproof.

When Oaken Brawler enters the battlefield, clash with an opponent. If you win, put a +1/+1 counter on Oaken Brawler. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

Flying, vigilance

: Add . Spend this mana only to cast an artifact spell or activate an ability of an artifact source.

Vigilance, trample

: Creatures you control get +1/+1 until end of turn.

You may cast Oakshade Stalker as though it had flash if you pay more to cast it.

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

: Prevent the next 1 damage that would be dealt to target creature this turn.

: Add one mana of any color.

, Exert Oasis Ritualist: Add two mana of any one color. (An exerted creature won't untap during your next untap step.)

When Oath of Chandra enters the battlefield, it deals 3 damage to target creature an opponent controls.

At the beginning of each end step, if a planeswalker entered the battlefield under your control this turn, Oath of Chandra deals 2 damage to each opponent.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I — Create two 1/1 white Human Soldier creature tokens.

II — Create two 2/2 red Human Knight creature tokens with trample and haste.

III — Put an indestructible counter on up to one target Human. You become the monarch.

When Oath of Gideon enters the battlefield, create two 1/1 white Kor Ally creature tokens.

Each planeswalker you control enters the battlefield with an additional loyalty counter on it.

When Oath of Kaya enters the battlefield, it deals 3 damage to any target and you gain 3 life.

Whenever an opponent attacks a planeswalker you control with one or more creatures, Oath of Kaya deals 2 damage to that player and you gain 2 life.

When Oath of Liliana enters the battlefield, each opponent sacrifices a creature.

At the beginning of each end step, if a planeswalker entered the battlefield under your control this turn, create a 2/2 black Zombie creature token.

At the beginning of each player's upkeep, that player chooses target player who has more life than they do and is their opponent. The first player may have Oath of Mages deal 1 damage to the second player.

At the beginning of each player's upkeep, that player chooses target player who has more cards in hand than they do and is their opponent. The first player may discard their hand and draw three cards.

Whenever Oath of the Ancient Wood or another enchantment enters the battlefield under your control, you may put a +1/+1 counter on target creature.

Equipped creature gets +3/+1.

Whenever equipped creature dies, return that card to the battlefield under your control if it's a Samurai card.

When Oathkeeper, Takeno's Daisho is put into a graveyard from the battlefield, exile equipped creature.

Equip

Oathsworn Knight enters the battlefield with four +1/+1 counters on it.

Oathsworn Knight attacks each combat if able.

If damage would be dealt to Oathsworn Knight while it has a +1/+1 counter on it, prevent that damage and remove a +1/+1 counter from it.

+2: Each opponent loses 1 life. You gain life equal to the life lost this way.

−2: Create a 5/5 black Demon creature token with flying. You lose 2 life.

−8: You get an emblem with ", Sacrifice a creature: You gain X life and draw X cards, where X is the sacrificed creature's power."

Ob Nixilis of the Black Oath can be your commander.

Flying, trample

Whenever one or more opponents each lose exactly 1 life, put a +1/+1 counter on Ob Nixilis, Captive Kingpin. Exile the top card of your library. Until your next end step, you may play that card.

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.

Flying, trample

Whenever an opponent searches their library, that player sacrifices a creature and loses 10 life.

Whenever another creature dies, put a +1/+1 counter on Ob Nixilis, Unshackled.

: The player whose turn it is may end the turn. (Exile all spells and abilities from the stack. The player whose turn it is discards down to their maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

, : You gain 5 life.

, : Draw a card, then discard a card.

, : Target creature gets -2/-2 until end of turn.

, : Obelisk of Alara deals 3 damage to target player or planeswalker.

, : Target creature gets +4/+4 until end of turn.

: Add , , or .

: Add , , or .

, : Return target permanent you both own and control to your hand.

Reach

Whenever Obelisk Spider deals combat damage to a creature, put a -1/-1 counter on that creature.

Whenever you put one or more -1/-1 counters on a creature, each opponent loses 1 life and you gain 1 life.

This spell can't be countered.

Destroy all artifacts, creatures, and lands. They can't be regenerated.

Aftermath (Cast this spell only from your graveyard. Then exile it.)

Target opponent discards two cards.

When Oblivion Ring enters the battlefield, exile another target nonland permanent.

When Oblivion Ring leaves the battlefield, return the exiled card to the battlefield under its owner's control.

, : Put a fate counter on target permanent.

, , Sacrifice Oblivion Stone: Destroy each nonland permanent without a fate counter on it, then remove all fate counters from all permanents.

Target creature you control gains indestructible until end of turn. Draw a card if that creature has a +1/+1 counter on it. (Damage and effects that say "destroy" don't destroy the creature.)

Flying

, Return a land you control to its owner's hand: Target creature gets -X/-0 until end of turn, where X is the number of cards in your hand.