Creatures you control get +X/+X until end of turn, where X is your devotion to green. (Each in the mana costs of permanents you control counts toward your devotion to green.)

Knickknack Ouphe enters with X +1/+1 counters on it.

When Knickknack Ouphe enters, reveal the top X cards of your library. You may put any number of Aura cards with mana value X or less from among them onto the battlefield. Then put all cards revealed this way that weren't put onto the battlefield on the bottom of your library in a random order.

Just a second (As long as this spell is on the stack, players can't move permanents.)

One at a time, throw ten cards you own from outside the game onto the playing area from a distance of at least three feet (about one meter). For each of those cards, Knife and Death deals 1 damage to each creature or planeswalker you don't control that card is touching. You gain life equal to the damage dealt this way.

First strike (This creature deals combat damage before creatures without first strike.)

Other Knight creatures you control get +1/+1 and have indestructible. (Damage and effects that say "destroy" don't destroy them.)

Whenever an enchantment you control is put into a graveyard from the battlefield, create a 1/1 white Bird creature token with flying.

Vigilance

As long as you are way behind, Knight of Lost Causes gets +3/+3 and has indestructible. (You are way behind if, at any point during this turn, an opponent had 10 or more life than you, controlled at least three more creatures than you, or had at least three more cards in hand than you.)

First strike

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

: Knight of the Ebon Legion gets +3/+3 and gains deathtouch until end of turn.

At the beginning of your end step, if a player lost 4 or more life this turn, put a +1/+1 counter on Knight of the Ebon Legion. (Damage causes loss of life.)

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)

If Knight of the Holy Nimbus would be destroyed, regenerate it. (Tap it, remove it from combat, and heal all damage on it.)

: Knight of the Holy Nimbus can't be regenerated this turn. Only your opponents may activate this ability.

First strike, protection from black borders (Nothing with a black border can block, target, deal damage to, or attach to this creature.)

First strike, protection from loose lips (Nothing with an open mouth in its artwork can block, target, deal damage to, or attach to this creature.)

First strike, protection from two-word names (Nothing with exactly two words in its name can block, target, deal damage to, or attach to this creature. Hyphenated words are one word.)

, Sacrifice another nontoken creature: Create a 1/1 white and black Spirit creature token with flying.

Afterlife 3 (When this creature dies, create three 1/1 white and black Spirit creature tokens with flying.)

Vigilance

When Knight of the New Coalition enters, create a 2/2 white and blue Knight creature token with vigilance.

Knight of the Reliquary gets +1/+1 for each land card in your graveyard.

, Sacrifice a Forest or Plains: Search your library for a land card, put it onto the battlefield, then shuffle.

Dinosaur spells you cast cost less to cast.

First strike

When Knight of the White Orchid enters, if an opponent controls more lands than you, you may search your library for a Plains card, put it onto the battlefield, then shuffle.

Trample

Frenzied Rampage — At the beginning of combat on your turn, choose an opponent at random. Knight Rampager attacks that player this combat if able.

When Knight Rampager dies, it deals 4 damage to target opponent chosen at random.

: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)

Whenever one or more +1/+1 counters are put on Knighted Myr, it gains double strike until end of turn.

Flying

Whenever another nontoken Bird you control enters, create a 1/1 blue Fish creature token.

When Knights of the Black Rose enters, you become the monarch.

Whenever an opponent becomes the monarch, if you were the monarch as the turn began, that player loses 2 life and you gain 2 life.

Flying

When Knollspine Dragon enters, you may discard your hand and draw cards equal to the damage dealt to target opponent this turn.

, : Add .

Whenever you scry, you may pay . If you do, Knowledge and Power deals 2 damage to any target.

Creatures you control get +X/+X, where X is the number of cards you've drawn this turn.

, : Exile the top card of your library face down.

: Sacrifice Knowledge Vault. If you do, discard your hand, then put all cards exiled with Knowledge Vault into their owner's hand.

When Knowledge Vault leaves the battlefield, put all cards exiled with Knowledge Vault into their owner's graveyard.

Other Kobold creatures you control get +0/+1 and have trample.

Other Kobold creatures you control get +1/+0.

Reach

Whenever another permanent you control enters, if it wasn't put onto the battlefield with this ability, you may put a permanent card with equal or lesser mana value from your hand onto the battlefield.

Partner (You can have two commanders if both have partner.)

Whenever you cast a Spirit or Arcane spell, each other creature you control gets +1/+1 and gains trample until end of turn.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Flying

When Kokusho, the Evening Star dies, each opponent loses 5 life. You gain life equal to the life lost this way.

: Add or .

: Kolaghan Monument becomes a 4/4 black and red Dragon artifact creature with flying until end of turn.

Haste

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

When Kolaghan Stormsinger is turned face up, target creature gains haste until end of turn.

Flying

Whenever a Dragon you control attacks, creatures you control get +1/+0 until end of turn.

Dash (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

This spell can't be countered.

At the beginning of each upkeep, create a 3/3 blue Serpent creature token named Koma's Coil.

Sacrifice another Serpent: Choose one —

• Tap target permanent. Its activated abilities can't be activated this turn.

• Koma, Cosmos Serpent gains indestructible until end of turn.

Menace

Equipped creature gets +2/+2 and has menace.

Whenever Komainu Battle Armor or equipped creature deals combat damage to a player, goad each creature that player controls.

Reconfigure (: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Vigilance, indestructible

Bushido 5 (Whenever this creature blocks or becomes blocked, it gets +5/+5 until end of turn.)

Other creatures you control get +1/+1.

Kicker (You may pay an additional as you cast this spell.)

Flying

When Kor Aeronaut enters, if it was kicked, target creature gains flying until end of turn.

Rally — Whenever Kor Bladewhirl or another Ally you control enters, creatures you control gain first strike until end of turn.

Whenever Kor Celebrant or another creature you control enters, you gain 1 life.

As long as Kor Duelist is equipped, it has double strike. (It deals both first-strike and regular combat damage.)

Protection from red

Whenever a player casts a red spell, you may gain 1 life.

: Add .

, : Prevent all combat damage that would be dealt by target attacking creature this turn.

: Tap target creature with power 3 or less.

Kicker (You may pay an additional as you cast this spell.)

When Kor Sanctifiers enters, if it was kicked, destroy target artifact or enchantment.

: Kor Sky Climber gains flying until end of turn.