When Kathril, Aspect Warper enters, put a flying counter on any creature you control if a creature card in your graveyard has flying. Repeat this process for first strike, double strike, deathtouch, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance. Then put a +1/+1 counter on Kathril for each counter put on a creature this way.

Flying, vigilance

Whenever Kellan, Inquisitive Prodigy attacks, destroy up to one target artifact. If you controlled that permanent, draw a card.

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

When Kheru Spellsnatcher is turned face up, counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. You may cast that card without paying its mana cost for as long as it remains exiled.

: Kindlespark Duo deals 1 damage to target opponent.

Whenever you cast a noncreature spell, untap Kindlespark Duo.

Other Plants and Treefolk you control get +2/+0.

At the beginning of each of your postcombat main phases, return target Plant, Treefolk, or land card from your graveyard to your hand.

Flying

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

Whenever Kolaghan Aspirant becomes blocked by a creature, Kolaghan Aspirant deals 1 damage to that creature.

When Kotose, the Silent Spider enters, exile target card other than a basic land card from an opponent's graveyard. Search that player's graveyard, hand, and library for any number of cards with the same name as that card and exile them. Then that player shuffles. For as long as you control Kotose, you may play one of the exiled cards, and you may spend mana as though it were mana of any color to cast it.

Kumena's Speaker gets +1/+1 as long as you control another Merfolk or an Island.

Target creature gets -3/-3 until end of turn.

Lava Spike deals 3 damage to target player or planeswalker.

Vigilance

Whenever you cast your second spell each turn, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

: Add . Activate only during an opponent's turn.

Flying, vigilance

Whenever Leori, Sparktouched Hunter deals combat damage to a player, choose a planeswalker type. Until end of turn, whenever you activate an ability of a planeswalker of that type, copy that ability. You may choose new targets for the copies.

, Sacrifice three Spirits: Search your library for a legendary Spirit permanent card, put it onto the battlefield, then shuffle.

Equipped creature gets +1/+0 and has trample.

, Sacrifice Lightning Spear: It deals 3 damage to any target.

Equip

Target opponent discards a card.

Look at the top five cards of your library. You may reveal a black card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

: Add one mana of any color.

: Target land you control becomes a 3/3 Elemental creature with haste until end of turn. It's still a land. Activate only as a sorcery.

This spell costs less to cast if you control a Pirate.

Counter target spell unless its controller pays .

When Loot Dispute enters, you take the initiative and create a Treasure token.

Whenever you attack the player who has the initiative, create a Treasure token.

Loud Ruckus — Whenever you complete a dungeon, create a 5/5 red Dragon creature token with flying.

Companion — Each nonland card in your starting deck has a different name. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)

Flash

When Lutri, the Spellchaser enters, if you cast it, copy target instant or sorcery spell you control. You may choose new targets for the copy.

Flying

When Magister Sphinx enters, target player's life total becomes 10.

Haste

When Magmatic Sprinter enters, put two oil counters on target artifact or creature you control.

At the beginning of your end step, return Magmatic Sprinter to its owner's hand unless you remove two oil counters from it.

Gain control of target creature until end of turn. Untap that creature. It gets +2/+0 and gains haste until end of turn.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Reach (This creature can block creatures with flying.)

Whenever Mardu Shadowspear attacks, each opponent loses 1 life.

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.)

When Master Splicer enters, create a 3/3 colorless Phyrexian Golem artifact creature token.

Golems you control get +1/+1.

Flying, protection from black

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Whenever Merfolk Spy deals combat damage to a player, that player reveals a card at random from their hand.

Enchant creature

Enchanted creature has trample and haste.

Flying

Metathran Transport can't be blocked by blue creatures.

: Target creature becomes blue until end of turn.

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

Draw two cards.

Gift a tapped Fish (You may promise an opponent a gift as you cast this spell. If you do, they create a tapped 1/1 blue Fish creature token before its other effects.)

Target player draws three cards. If the gift was promised, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Defender (This creature can't attack.)

Flying

Whenever Mindbender Spores blocks a creature, put four fungus counters on that creature. The creature gains "This creature doesn't untap during your untap step if it has a fungus counter on it" and "At the beginning of your upkeep, remove a fungus counter from this creature."

Flash

At the beginning of your upkeep, put an oil counter on Mindsplice Apparatus.

Instant and sorcery spells you cast cost less to cast for each oil counter on Mindsplice Apparatus.

Enchant creature

Enchanted creature gets -3/-3.

Deathtouch

Whenever Mirkwood Spider attacks, target legendary creature you control gains deathtouch until end of turn.

Flying

Whenever you cast an artifact spell, you may untap target creature.

, Sacrifice Mnemonic Sphere: Draw two cards.

Channel — , Discard Mnemonic Sphere: Draw a card.

Flying

Instant and sorcery spells you cast cost less to cast.

Flying

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

When Moonsnare Specialist enters, return up to one target creature to its owner's hand.

Trample

When Mosswood Dreadknight dies, you may cast it from your graveyard as an Adventure until the end of your next turn.

Destroy target nonblack creature. It can't be regenerated. You gain control of all Equipment that were attached to it. (This effect lasts indefinitely.)

When Mycosynth Wellspring enters or is put into a graveyard from the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)

Scry 3. (Look at the top three cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Whenever Nafs Asp deals damage to a player, that player loses 1 life at the beginning of their next draw step unless they pay before that draw step.

Return target permanent card from your graveyard to your hand.

Sacrifice a land: Target creature gains haste until end of turn.

Needle Spires enters tapped.

: Add or .

: Needle Spires becomes a 2/1 red and white Elemental creature with double strike until end of turn. It's still a land.

Reach

: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)