This land enters tapped unless you control two or fewer other lands.
: Add or .

Exile all nontoken creatures you control, then roll a d20.
1—9 | Return those cards to the battlefield under their owner's control at the beginning of the next end step.
10—20 | Return those cards to the battlefield under their owner's control, then exile them again. Return those cards to the battlefield under their owner's control at the beginning of the next end step.

Flying
Whenever you cast a noncreature spell, create an X/X red Dragon Illusion creature token with flying and haste, where X is the amount of mana spent to cast that spell. Exile that token at the beginning of the next end step.

You may play an additional land this turn.
Draw a card.

This land enters tapped unless you control an Island.
: Add .
, : The next spell you cast this turn has improvise. (Your artifacts can help cast that spell. Each artifact you tap after you're done activating mana abilities pays for .)

Vigilance, lifelink
Darkforce Inversion — When Mister Negative enters, you may exchange life totals with target opponent. If you lost life this way, draw that many cards.

Whenever another creature enters, you gain 1 life.

Blocking creatures get +0/+3 until end of turn.

All Sliver creatures get +1/+1.

Choose two target creatures. Untap them. Put two +1/+1 counters on each of them. They gain vigilance, indestructible, and haste until end of turn. After this main phase, there is an additional combat phase. Only the chosen creatures can attack during that combat phase.

Whenever a source you control deals noncombat damage to an opponent, you may exile that many cards from the top of your library. You may play those cards this turn.

Flash
When this creature enters, counter target spell.

(: Add .)

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

Menace
Whenever this creature attacks, each opponent loses X life and you gain X life, where X is the number of other Squirrels, Bats, Lizards, and Rats you control.

Subterranean Tremors deals X damage to each creature without flying. If X is 4 or more, destroy all artifacts. If X is 8 or more, create an 8/8 red Lizard creature token.

When this creature enters, create two 1/1 white Human Soldier creature tokens.
At the beginning of your end step, if another Human died under your control this turn, create a Food token.

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.

When Captain America enters, you may search your library for an Equipment card with mana value 3 or less, put it onto the battlefield, then shuffle.
Whenever Captain America attacks, for each Equipment attached to him, create a 1/1 white Soldier creature token.

Target player creates X 2/2 black Zombie creature tokens, then up to one target creature gets -1/-1 until end of turn for each Zombie that player controls.