Thassa, Deep-Dwelling

Indestructible
As long as your devotion to blue is less than five, Thassa isn't a creature.
At the beginning of your end step, exile up to one other target creature you control, then return that card to the battlefield under your control.
{3}{U}: Tap another target creature.

Cyclonic Rift

Return target nonland permanent you don't control to its owner's hand.
Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Kavu Scout

Domain — Kavu Scout gets +1/+0 for each basic land type among lands you control.

Rooting Kavu

When Rooting Kavu dies, you may exile it. If you do, shuffle all creature cards from your graveyard into your library.

Explosive Vegetation

Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Pygmy Kavu

When Pygmy Kavu enters, draw a card for each black creature your opponents control.

Wild Pair

Whenever a creature enters, if you cast it from your hand, you may search your library for a creature card with the same total power and toughness, put it onto the battlefield, then shuffle.

Kavu Mauler

Trample
Whenever Kavu Mauler attacks, it gets +1/+1 until end of turn for each other attacking Kavu.

Kavu Monarch

Kavu creatures have trample.
Whenever another Kavu enters, put a +1/+1 counter on Kavu Monarch.

Guardian Project

Whenever a nontoken creature you control enters, if it doesn't have the same name as another creature you control or a creature card in your graveyard, draw a card.

Mire Kavu

Mire Kavu gets +1/+1 as long as you control a Swamp.

Forest

Coat of Arms

Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)

Swamp

Counterspell

Firemaw Kavu

Echo {5}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Firemaw Kavu enters, it deals 2 damage to target creature.
When Firemaw Kavu leaves the battlefield, it deals 4 damage to target creature.

Island

Rogue Kavu

Whenever Rogue Kavu attacks alone, it gets +2/+0 until end of turn.

The Great Henge

This spell costs {X} less to cast, where X is the greatest power among creatures you control.
{T}: Add {G}{G}. You gain 2 life.
Whenever a nontoken creature you control enters, put a +1/+1 counter on it and draw a card.

Kindred Dominance

Choose a creature type. Destroy all creatures that aren't of the chosen type.

Firescreamer

{R}: Firescreamer gets +1/+0 until end of turn.

Kavu Primarch

Kicker {4} (You may pay an additional {4} as you cast this spell.)
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.)
If Kavu Primarch was kicked, it enters with four +1/+1 counters on it.

Kavu Howler

When Kavu Howler enters, reveal the top four cards of your library. Put all Kavu cards revealed this way into your hand and the rest on the bottom of your library in any order.

Kavu Climber

Slimy Kavu

{T}: Target land becomes a Swamp until end of turn.

Untamed Kavu

Kicker {3} (You may pay an additional {3} as you cast this spell.)
Vigilance, trample
If Untamed Kavu was kicked, it enters with three +1/+1 counters on it.

Amphibious Kavu

Whenever Amphibious Kavu blocks or becomes blocked by one or more blue and/or black creatures, Amphibious Kavu gets +3/+3 until end of turn.

Rejuvenating Springs

Rejuvenating Springs enters tapped unless you have two or more opponents.
{T}: Add {G} or {U}.

Kindred Summons

Choose a creature type. Reveal cards from the top of your library until you reveal X creature cards of the chosen type, where X is the number of creatures you control of that type. Put those cards onto the battlefield, then shuffle the rest of the revealed cards into your library.

Thunderscape Familiar

First strike
Black spells and green spells you cast cost {1} less to cast.

Raging Kavu

Tundra Kavu

{T}: Target land becomes a Plains or an Island until end of turn.

Kavu Titan

Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.)
If Kavu Titan was kicked, it enters with three +1/+1 counters on it and with trample.

Chromatic Lantern

Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.

Tribal Unity

Creatures of the creature type of your choice get +X/+X until end of turn.

Ancient Kavu

{2}: Ancient Kavu becomes colorless until end of turn.

Caldera Kavu

{1}{B}: Caldera Kavu gets +1/+1 until end of turn.
{G}: Caldera Kavu becomes the color of your choice until end of turn.

Flametongue Kavu

When Flametongue Kavu enters, it deals 4 damage to target creature.

Nature's Lore

Search your library for a Forest card, put that card onto the battlefield, then shuffle.

Morophon, the Boundless

Changeling (This card is every creature type.)
As Morophon, the Boundless enters, choose a creature type.
Spells of the chosen type you cast cost {W}{U}{B}{R}{G} less to cast. This effect reduces only the amount of colored mana you pay.
Other creatures you control of the chosen type get +1/+1.

Bloodfire Kavu

{R}, Sacrifice Bloodfire Kavu: It deals 2 damage to each creature.

Serpentine Kavu

{R}: Serpentine Kavu gains haste until end of turn.

Putrefy

Destroy target artifact or creature. It can't be regenerated.

Mountain

Vicious Kavu

Whenever Vicious Kavu attacks, it gets +2/+0 until end of turn.

Intruder Alarm

Creatures don't untap during their controllers' untap steps.
Whenever a creature enters, untap all creatures.

Kavu Runner

Kavu Runner has haste as long as no opponent controls a white or blue creature.

Urza's Incubator

As Urza's Incubator enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.

Door of Destinies

As Door of Destinies enters, choose a creature type.
Whenever you cast a spell of the chosen type, put a charge counter on Door of Destinies.
Creatures you control of the chosen type get +1/+1 for each charge counter on Door of Destinies.

Patriarch's Bidding

Each player chooses a creature type. Each player returns all creature cards of a type chosen this way from their graveyard to the battlefield.

Kavu Lair

Whenever a creature with power 4 or greater enters, its controller draws a card.

Training Center

Training Center enters tapped unless you have two or more opponents.
{T}: Add {U} or {R}.

Kavu Glider

{W}: Kavu Glider gets +0/+1 until end of turn.
{U}: Kavu Glider gains flying until end of turn.

Kavu Predator

Trample
Whenever an opponent gains life, put that many +1/+1 counters on Kavu Predator.

Kavu Recluse

{T}: Target land becomes a Forest until end of turn.

Alpha Kavu

{1}{G}: Target Kavu creature gets -1/+1 until end of turn.

Distant Melody

Choose a creature type. Draw a card for each permanent you control of that type.

Vanquisher's Banner

As Vanquisher's Banner enters, choose a creature type.
Creatures you control of the chosen type get +1/+1.
Whenever you cast a creature spell of the chosen type, draw a card.

Radiant Kavu

{R}{G}{W}: Prevent all combat damage blue creatures and black creatures would deal this turn.

Pouncing Kavu

Kicker {2}{R} (You may pay an additional {2}{R} as you cast this spell.)
First strike
If Pouncing Kavu was kicked, it enters with two +1/+1 counters on it and with haste.

Hunting Kavu

{1}{R}{G}, {T}: Exile Hunting Kavu and target creature without flying that's attacking you.

Kavu Aggressor

Kicker {4} (You may pay an additional {4} as you cast this spell.)
Kavu Aggressor can't block.
If Kavu Aggressor was kicked, it enters with a +1/+1 counter on it.

Penumbra Kavu

When Penumbra Kavu dies, create a 3/3 black Kavu creature token.

Kavu Chameleon

This spell can't be countered.
{G}: Kavu Chameleon becomes the color of your choice until end of turn.

Hooded Kavu

{B}: Hooded Kavu gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Vault of Champions

Vault of Champions enters tapped unless you have two or more opponents.
{T}: Add {W} or {B}.

Horned Kavu

When Horned Kavu enters, return a red or green creature you control to its owner's hand.

Yavimaya Kavu

Yavimaya Kavu's power is equal to the number of red creatures on the battlefield.
Yavimaya Kavu's toughness is equal to the number of green creatures on the battlefield.

Kodama's Reach

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.

Sparkcaster

When Sparkcaster enters, return a red or green creature you control to its owner's hand.
When Sparkcaster enters, it deals 1 damage to target player or planeswalker.

Skittish Kavu

Skittish Kavu gets +1/+1 as long as no opponent controls a white or blue creature.

Stone Kavu

{R}: Stone Kavu gets +1/+0 until end of turn.
{W}: Stone Kavu gets +0/+1 until end of turn.