Vigilance
When this creature enters, if an opponent controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.

Spells can't be countered.
Each instant and sorcery card in your graveyard has flashback. The flashback cost is equal to that card's mana cost.

Dragon spells you cast cost less to cast.

Forests you control are 1/1 green Elf creatures that are still lands.
, Sacrifice an Elf: Target creature gets +3/+3 until end of turn.

Whenever another creature you control dies, you get an experience counter.
At the beginning of your end step, choose target creature card in your graveyard. If that card's mana value is less than or equal to the number of experience counters you have, return it to the battlefield. Otherwise, put it into your hand.

At the beginning of your first main phase, you may blight 1. If you do, create a Treasure token. (To blight 1, put a -1/-1 counter on a creature you control. A Treasure token is an artifact with ", Sacrifice this token: Add one mana of any color.")

When this enchantment enters, it deals 3 damage to each creature and each planeswalker.
Landfall — Whenever a land you control enters, create a 4/4 red Dragon creature token with flying.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Destroy all nontoken creatures.

Changeling (This card is every creature type.)
As this creature enters, choose a creature type.
You may look at the top card of your library any time.
You may cast creature spells of the chosen type from the top of your library.

Enchant player
At the beginning of enchanted player's upkeep, that player reveals cards from the top of their library until they reveal a creature card. Put that card onto the battlefield under your control. That player puts the rest of the revealed cards into their graveyard.

Squad (As an additional cost to cast this spell, you may pay any number of times. When this creature enters, create that many tokens that are copies of it.)
When this creature enters, each player sacrifices a creature of their choice.

: Add one mana of any color that a land you control could produce.

Menace
When Massacre Girl enters, each other creature gets -1/-1 until end of turn. Whenever a creature dies this turn, each creature other than Massacre Girl gets -1/-1 until end of turn.

Destroy target artifact you don't control.
Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

, : Choose another target artifact creature you control. When that creature dies this turn, return it to the battlefield tapped under your control.

You may play lands from your graveyard.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Artifact creatures you control get +2/+2.

(: Add .)

Undergrowth — Search your library for a black card with mana value less than or equal to the number of creature cards in your graveyard, reveal it, put it into your hand, then shuffle.

As this enchantment enters, choose Sultai or Abzan.
• Sultai — Whenever a counter is put on a creature you control, draw a card. This ability triggers only once each turn.
• Abzan — Whenever you attack, put a +1/+1 counter on target attacking creature. It gains menace until end of turn.