Protection from black (This creature can't be blocked, targeted, dealt damage, or enchanted by anything black.)

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

First strike

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

Vigilance

Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)

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

Suspend 3— (Rather than cast this card from your hand, you may pay and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)

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.

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.

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.

Create two 2/2 white Knight creature tokens with vigilance.

Creatures you control have first strike.

Protection from red; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

, Discard a card with mana value X: Knollspine Invocation deals X damage to any target.

Whenever Knotvine Paladin attacks, it gets +1/+1 until end of turn for each untapped creature you control.

Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.)

Search target opponent's library for an instant or sorcery card. You may cast that card without paying its mana cost. Then that player shuffles.

, : 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.

Kodama of the Center Tree's power and toughness are each equal to the number of Spirits you control.

Kodama of the Center Tree has soulshift X, where X is the number of Spirits you control. (When this creature dies, you may return target Spirit card with mana value X or less from your graveyard to your hand.)

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.

Vigilance, indestructible

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

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)

As long as you control a legendary Samurai, Konda's Hatamoto gets +1/+2 and has vigilance. (Attacking doesn't cause this creature to tap.)

: Kongming's Contraptions deals 2 damage to target attacking creature. Activate only during the declare attackers step and only if you've been attacked this step.

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.

All damage that would be dealt this turn to target creature you control by a source of your choice is dealt to another target creature instead.

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

: 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 Spiritdancer gets +2/+2 for each Aura attached to it.

Whenever you cast an Aura spell, you may draw a card.

All Swamps are 1/1 black creatures that are still lands.

: Target creature gets +1/+1 and gains intimidate until end of turn. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)

, Sacrifice a nontoken creature: Create X 1/1 green Saproling creature tokens, where X is the sacrificed creature's toughness.

At the beginning of your upkeep, sacrifice Koskun Falls unless you tap an untapped creature you control.

Creatures can't attack you unless their controller pays for each creature they control that's attacking you.

+1: Untap target Mountain. It becomes a 4/4 red Elemental creature until end of turn. It's still a land.

−2: Add for each Mountain you control.

−5: You get an emblem with "Mountains you control have ‘: This land deals 1 damage to any target.'"

When you cast this spell, draw four cards.

Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents of their choice.)

When Kozilek, Butcher of Truth is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.

Inspired — Whenever Kragma Butcher becomes untapped, it gets +2/+0 until end of turn.

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

: Krallenhorde Killer gets +4/+4 until end of turn. Activate only once each turn.

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Krallenhorde Killer.

: Kranioceros gets +0/+3 until end of turn.

Sacrifice an artifact: Krark-Clan Grunt gets +1/+0 and gains first strike until end of turn.

, Sacrifice an artifact: Target creature can't block this turn.

, Sacrifice an artifact: Add .

Enchant creature

Enchanted creature can't attack or block, and its activated abilities can't be activated.

, Return Krasis Incubation to its owner's hand: Put two +1/+1 counters on enchanted creature.

At the beginning of your upkeep, roll a six-sided die. If you a roll a 1, sacrifice Krazy Kow and it deals 3 damage to each creature and each player.

Create two 1/1 red Goblin creature tokens.

, , Discard a card: Kris Mage deals 1 damage to any target.

Reach (This creature can block creatures with flying.)

, Discard a card: Krosan Archer gets +0/+2 until end of turn.

Threshold — Krosan Beast gets +7/+7 as long as seven or more cards are in your graveyard.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Creature spells you cast with mana value 6 or greater cost less to cast.