The Relentless Dragon

Creature — Shapeshifter

Changeling (This card is every creature type.) When this creature enters, put a +1/+1 counter on target creature.

Creature — Human Soldier

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.) Whenever this creature enlists a creature, scry 2. Discard a card: This creature gains indestructible until end of turn. Tap it.

Creature — Spirit

Whenever you cast a Spirit or Arcane spell, target creature gains flying until end of turn.

Creature — Elephant Warrior

Vigilance Whenever a modified creature you control dies, manifest the top card of your library. (Equipment, Auras you control, and counters are modifications. To manifest a card, put the top card of your library onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Creature — Spirit

Protection from monocolored

Creature — Elemental

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.) Vigilance

Creature — Dragon

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following abilities until end of turn.) Flying Whenever this creature attacks, return target nonland permanent card with mana value X or less from your graveyard to the battlefield, where X is this creature's power.

Creature — Angel

Flying If a source an opponent controls would deal damage to you, prevent 1 of that damage.

Creature — Moonfolk Samurai

Defender Modified creatures you control can attack as though they didn't have defender. (Equipment, Auras you control, and counters are modifications.)

Creature — Horse Mount

Ward {2} Whenever this creature attacks while saddled, search your library for a nonland permanent card with mana value 3 or less, put it onto the battlefield, then shuffle. Saddle 4

Instant

Guerrilla Tactics deals 2 damage to any target. When a spell or ability an opponent controls causes you to discard this card, it deals 4 damage to any target.

Instant

Target creature gets +1/+0 and gains first strike until end of turn. Draw a card.

Sorcery

Put a +1/+1 counter on target creature. Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Enchantment

At the beginning of your upkeep, target opponent reveals the top three cards of their library, may put a creature card from among them onto the battlefield, then puts the rest into their graveyard. You do the same with the top three cards of your library. If two creatures are put onto the battlefield this way, those creatures fight each other.

Land

{T}: Add {C}. {1}, {T}: Add one mana of any color. If that mana is spent on a multicolored creature spell, that creature enters with an additional +1/+1 counter on it.

Enchantment — Aura

Enchant creature Whenever enchanted creature deals damage, this Aura deals that much damage to that creature.

Creature — Phyrexian Horror

When this creature enters or dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Instant

You may return two Islands you control to their owner's hand rather than pay this spell's mana cost. Draw two cards.

Creature — Bird Soldier

Flying Whenever a creature you control becomes blocked, you may untap that creature and remove it from combat.

Snow Creature — Zombie

{1}, Sacrifice a creature: You gain 2 life.

Enchantment

Whenever a nontoken creature you control dies, put a slime counter on this enchantment, then create a green Ooze creature token with "This token's power and toughness are each equal to the number of slime counters on Gutter Grime."

Instant

Counter target blue instant spell.

Creature — Vampire

Flying Landfall — Whenever a land you control enters, other creatures you control get +1/+0 until end of turn. If that land is a Swamp, those creatures get +2/+0 until end of turn instead.

Creature — Specter

Flying This creature gets +3/+3 as long as an opponent has no cards in hand. Whenever this creature deals combat damage to a player, that player discards a card.

Creature — Human Advisor

{T}: Add one mana of any color. Web Support — {2}{G}, {T}: Put a +1/+1 counter on target Spider. Activate only as a sorcery.

Legendary Creature — Human Rogue

{W}{U}, {T}: Put a bribery counter on target creature you don't control. Its controller draws a card. Creatures with bribery counters on them can't attack or block.

Legendary Creature — Human Rogue

{T}: Target player discards a card at random. Activate only during your turn.

Legendary Creature — Demon Kraken

Companion — Your starting deck contains only cards with even mana values. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.) When Gyruda enters, each player mills four cards. Put a creature card with an even mana value from among the milled cards onto the battlefield under your control.

Sorcery

Create a 2/2 green Bird creature token with "Whenever a land you control enters, this token gets +1/+0 until end of turn." Flashback {6}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Creature — Troll Berserker

Boast — {1}{R}: This creature deals 1 damage to any target. (Activate only if this creature attacked this turn and only once each turn.)

Instant

Hail Storm deals 2 damage to each attacking creature and 1 damage to you and each creature you control.

Snow Creature — Angel Wizard

Flying, trample {S}{S}: This creature gets +2/+2 until end of turn. ({S} can be paid with one mana from a snow source.)

Legendary Creature — Human Wizard

Flying {U}{U}: Return target Aura card from your graveyard to the battlefield attached to Hakim. Activate only during your upkeep and only if Hakim isn't enchanted. {U}{U}, {T}: Destroy all Auras attached to Hakim.

Legendary Creature — Human Warrior

Haktos attacks each combat if able. As Haktos enters, choose 2, 3, or 4 at random. Haktos has protection from each mana value other than the chosen number.

Legendary Creature — Human Ranger

First strike (This creature deals combat damage before creatures without first strike.) Reach (This creature can block creatures with flying.) At the beginning of combat on your turn, put X +1/+1 counters on another target creature you control, where X is Halana and Alena's power. That creature gains haste until end of turn.

Legendary Creature — Human Wizard

Partner with Pako, Arcane Retriever (When this creature enters, target player may put Pako into their hand from their library, then shuffle.) You may play lands and cast noncreature spells from among cards you exiled that have fetch counters on them, and you may spend mana as though it were mana of any color to cast those spells.

Legendary Creature — Shapeshifter

At the beginning of your upkeep, change Halfdane's base power and toughness to the power and toughness of target creature other than Halfdane until the end of your next upkeep.

Land

This land enters tapped. When this land enters, look at the top three cards of your library, then put them back in any order. {T}: Add {U}.

Creature — Lizard Shaman

Haste {1}{R}, {T}: Target creature can't block this turn.

World Enchantment

At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.

Land

If you control two or more other lands, this land enters tapped. {T}: Add {U}. {5}{U}: Until end of turn, this land becomes a 7/7 blue Giant creature with ward {3}. It's still a land. (Whenever it becomes the target of a spell or ability an opponent controls, counter it unless that player pays {3}.)

Legendary Artifact

As Hall of Triumph enters, choose a color. Creatures you control of the chosen color get +1/+1.

Sorcery

Put all creatures on the bottom of their owners' libraries.

Sorcery

Exile target nonlegendary creature, then return it to the battlefield under its owner's control. If it entered under your control, put a +1/+1 counter on it. Otherwise, tap it. Flashback {1}{W}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Land

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Creatures that attacked during their controller's last turn can't attack.

Creature — Demon

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.) When this creature enters, destroy target Angel.

Artifact Creature — Insect

{2}, Exile this card from your graveyard: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Legendary Creature — Human Wizard

Room abilities of dungeons you own trigger an additional time.

Creature — Giant Warrior

Whenever another creature enters, you may put X +1/+1 counters on this creature, where X is that creature's power.

Creature — Giant

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.) This spell costs {2} less to cast if it's bargained. Trample When this creature enters, you gain 3 life.

Enchantment — Aura

Enchant creature When this Aura enters, target creature can't block this turn. Enchanted creature gets +1/+1 and has haste.

Legendary Land

{T}: Add {R}. {T}: Target creature loses all landwalk abilities until end of turn.

Sorcery

Destroy target nonblack creature.

Creature — Human Samurai

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

Artifact

{2}, {T}: Create a 2/2 colorless Homunculus creature token. It must be represented by a unique hand and two fingers at all times, or it ceases to exist.

Creature — Spirit

Flying When this creature enters, create a 1/1 white Spirit creature token with flying. {3}{W}, Exile this creature: Exile target creature.