Whenever you attack, up to one target attacking creature can't be blocked this turn. Return that creature to its owner's hand at the beginning of the next end step. Choose a Background (You can have a Background as a second commander.)

Start your engines! (If you have no speed, it starts at 1. It increases once on each of your turns when an opponent loses life. Max speed is 4.) {T}: Add {C}. Max speed — {3}, {T}, Discard a card: Draw a card.

When this land enters, sacrifice it. When you do, search your library for a basic Forest, Plains, or Island card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

As this land enters, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

({T}: Add {G}.)

({T}: Add {G}.) This land enters tapped unless you control three or more other Forests. When this land enters untapped, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")

This land enters tapped. {T}: Add {G}. {4}{G}, {T}, Sacrifice this land: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

({T}: Add {U}.)

This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

When this land enters, you gain 2 life. {T}: Add {C}.

This land enters tapped. When this land enters, sacrifice it unless you pay {1}. {T}: Add one mana of any color.

This land enters tapped. As this land enters, choose a color. {T}: Add one mana of the chosen color.

{T}: Add {C}. {1}, {T}: Add one mana of any color.

Whenever you become the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {1}. Creature tokens get -1/-0.

This artifact enters tapped. {T}: Add two mana of different colors.

Equipped creature has "You may look at the top card of your library any time" and "Whenever this creature attacks, it explores." (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.) Equip {2}

This artifact enters tapped. {T}: Add {G}.

This artifact enters tapped. {T}: Add {G}.

{T}: Add one mana of any color. {1}, {T}: Untap target legendary creature you control.

Vigilance {3}, {T}: Put a +1/+1 counter on target creature. Tap two untapped tokens you control: This Vehicle becomes an artifact creature until end of turn.

Whenever this creature deals combat damage to a player, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. That card gains flashback {0} until end of turn instead if this creature is saddled. (You may cast that card from your graveyard for its flashback cost. Then exile it.) Saddle 3

Whenever you cast a creature spell, draw a card.

{4}{G}: Look at the top three cards of your library. You may reveal a permanent card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Trample When this creature enters, create two Food tokens. (They're artifacts with "{2}, {T}, Sacrifice this token: You gain 3 life.") Whenever this creature attacks, you may sacrifice a Food. If you do, mill three cards. You may put a permanent card from among them into your hand.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Trample This creature gets +10/+10 as long as you control ten or more lands.

During your turn, as long as you haven't activated an exhaust ability this turn, you may activate exhaust abilities as though they haven't been activated. Exhaust — {1}{G}: Put a +1/+1 counter on this creature. (Activate each exhaust ability only once.)

When this creature enters, return target permanent card from your graveyard to your hand.

Whenever this creature deals combat damage to a player, draw that many cards.

Trample When this creature enters, you may remove any number of +1/+1 counters from among creatures you control. If you do, put twice that many +1/+1 counters on this creature.

Whenever another green creature you control enters, put a +1/+1 counter on target creature.

When this creature enters, put a +1/+1 counter on target creature you control.

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.) When this creature enters, you may put a +1/+1 counter on another target creature.

Changeling (This card is every creature type.) When this creature enters, you may exile a creature card from your graveyard. If you do, exile target artifact or enchantment an opponent controls.

You may have this creature enter as a copy of a creature you control, except it has "{2}{U}{U}: Return this creature to its owner's hand."

At the beginning of your end step, if a creature died this turn, put a +1/+1 counter on this creature and untap it.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When this creature enters, return target instant or sorcery card from your graveyard to your hand.

This creature can't be blocked. Threshold — Whenever this creature deals combat damage to a player, draw a card. Then discard a card unless seven or more cards are in your graveyard.

Start your engines! (If you have no speed, it starts at 1. It increases once on each of your turns when an opponent loses life. Max speed is 4.) Max speed — {1}, Sacrifice this creature: Copy target spell you control. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)

Flying (This creature can't be blocked except by creatures with flying or reach.) Sacrifice this creature: Counter target spell unless its controller pays {1}.

Sacrifice this creature: Prevent all combat damage that would be dealt this turn.

{T}: Add one mana of any color.

This creature enters with three +1/+1 counters on it. Whenever this creature enters or attacks, create a number of 1/1 colorless Gnome artifact creature tokens equal to its power. {2}, Sacrifice another artifact: Put a +1/+1 counter on this creature.

Flash (You may cast this spell any time you could cast an instant.) Flying Spells you cast with mana value 5 or greater cost {1} less to cast and can't be countered.

Flying When this creature enters, draw a card.

Escape—{5}{G}{G}, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) This creature escapes with three +1/+1 counters on it.

This spell costs {1} less to cast if you control two or more legendary creatures. Scry 2, then draw two cards.

Return up to three target artifacts and/or creatures to their owners' hands. You may cast a spell with mana value 4 or less from your hand without paying its mana cost.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. You gain 2 life.

Incubate 3. (Create an Incubator token with three +1/+1 counters on it and "{2}: Transform this token." It transforms into a 0/0 Phyrexian artifact creature.) Draw a card.

Return target instant or sorcery card from your graveyard to your hand. Exile Flood of Recollection.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Draw three cards.

Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, you may draw a card.

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control.

Counter target spell.

As an additional cost to cast this spell, tap an untapped artifact you control or pay {1}. Counter target spell.

Counter target creature spell.

Prevent all combat damage that would be dealt this turn.

Scry 2, then draw two cards. You get {E}{E} (two energy counters).

Tap target creature. Scry 1. Draw a card.

Choose target creature you control. Whenever that creature deals combat damage to a player or planeswalker this turn, draw that many cards.

Put two +1/+1 counters on target creature. Delirium — Put three +1/+1 counters on that creature instead if there are four or more card types among cards in your graveyard.

Target creature you control with a +1/+1 counter on it fights target creature an opponent controls. (Each deals damage equal to its power to the other.)

Return target creature you control and target creature you don't control to their owners' hands.

Choose one or more — • Counter target spell. • Counter target activated or triggered ability. • Return target nonland permanent to its owner's hand. • Create a token that's a copy of target creature you control. • Target player draws a card.

Creatures your opponents control get -2/-0 until end of turn. Draw a card.