The Card Yard

Creature — Human Artificer

When this creature enters, create a 1/1 colorless Thopter artifact creature token with flying. Artifact creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Artifact Land

This land enters tapped. Indestructible {T}: Add {G} or {W}.

Creature — Rat Rogue

Offspring {3} (You may pay an additional {3} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) When this creature enters, target opponent loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card.

Land

{T}: Add {R}. {T}: Add {G}. Activate only if you control a Mountain or a Forest.

Land

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {G} or {U}.

Artifact Creature — Construct

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) Flying When this creature enters, draw two cards.

Creature — Rat Rogue

Threshold — {1}{U}: Put a +1/+1 counter on this creature and draw a card. Activate only if there are seven or more cards in your graveyard and only once.

Creature — Lizard Warlock

Menace (This creature can't be blocked except by two or more creatures.) When this creature enters, choose target opponent. If they lost life this turn, they reveal their hand, you choose a nonland card from it, and they discard that card. Otherwise, they discard a card.

Artifact

You have no maximum hand size. {T}: Add {C}.

Creature — Kithkin Advisor

Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of Kithkin you control.

Creature — Human Wizard

{T}: Exile target creature card from a graveyard.

Creature — Human Soldier

Vigilance

Creature — Angel

Flying, vigilance Other nontoken creatures you control get +1/+1 and have vigilance.

Legendary Land

As Three Tree City enters, choose a creature type. {T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to the number of creatures you control of the chosen type.

Artifact Creature — Shapeshifter

Changeling (This card is every creature type.) {1}: Add one mana of any color. Activate only once each turn.

Creature — Mole Druid

{T}: Add one mana of any color.

Creature — Frog Druid

Whenever this creature or another creature you control leaves the battlefield without dying, put a +1/+1 counter on target creature you control.

Creature — Siren

Flash Flying When this creature enters, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

Instant

As an additional cost to cast this spell, discard a card. Draw two cards.

Land

This land enters tapped. As it enters, choose a color other than red. {T}: Add {R} or one mana of the chosen color.

Land

This land enters tapped. As it enters, choose a color other than white. {T}: Add {W} or one mana of the chosen color.

Land

This land enters tapped. As it enters, choose a color other than black. {T}: Add {B} or one mana of the chosen color.

Creature — Cat Dragon

Flying When this creature enters, you get {E}{E}{E} (three energy counters). Whenever this creature attacks, you may pay {E}{E}{E}. If you do, put a +1/+1 counter on it.

Creature — Rat Ninja

Ninjutsu {2}{B} ({2}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever this creature deals combat damage to a player, destroy target nonblack creature that player controls.

Sorcery

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Enchantment

Flash Whenever a Villain you control dies, return it to the battlefield under its owner's control with a finality counter on it. That creature is a Hero in addition to its other types. (If a creature with a finality counter on it would die, exile it instead.)

Creature — Drake

Flash (You may cast this spell any time you could cast an instant.) Flying Other creatures you control with flying get +1/+1.

Creature — Giant

Haste (This creature can attack and {T} as soon as it comes under your control.)

Creature — Human Wizard

When this creature enters, it deals X damage to target creature or planeswalker, where X is the number of creatures in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

Creature — Turtle Hydra

Whenever you cast a spell with mana value 5 or greater, draw a card.

Legendary Creature — Dragon God

Flying When Tiamat enters, if you cast it, search your library for up to five Dragon cards not named Tiamat that each have different names, reveal them, put them into your hand, then shuffle.

Creature — Dragon Warrior

Haste Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Creature — Devil

When this creature dies, it deals 1 damage to any target. {1}{R}: This creature gets +2/+0 until end of turn.

Creature — Rat Wizard

Menace Threshold — When this creature enters, if there are seven or more cards in your graveyard, return up to one target nonland permanent to its owner's hand.

Creature — Merfolk Wizard

Kicker {1} (You may pay an additional {1} as you cast this spell.) When this creature enters, if it was kicked, target land becomes an Island for as long as this creature remains on the battlefield. This creature gets +1/+1 as long as an opponent controls an Island.

Creature — Drake

Flying Whenever you attack with two or more creatures with flying, draw a card.

Creature — Cat Seal

Vigilance At the beginning of your upkeep, tap this creature. Whenever you draw your second card each turn, untap this creature.

Legendary Creature — Cat Human Hero

Flash Trample Whenever you gain life, put a +1/+1 counter on Tigra.

Land

This land enters tapped. {T}: Add {R} or {G}.

Sorcery

Put target creature on top of its owner's library.