Sacrifice this creature: Put a -1/-1 counter on target creature.

Reach
Undergrowth — When this creature enters, choose up to one target creature you don't control with flying. This creature gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard, then you may have this creature fight that creature.

Equipped creature has flying and lifelink.
Whenever equipped creature dies, you may pay X life, where X is its power. If you do, draw X cards.
Equip

Flying
: Add one mana of any color.

Creatures you control get +0/+1 and have reach. (They can block creatures with flying.)

: Add .

Flying
Whenever you cast a spell, you may discard your hand. If you do, draw a card for each of that spell's colors.
When this creature dies, it deals X damage to any target, where X is the number of colors among permanents you control.

, : Spin this artifact in the middle of the table so that it rotates completely at least once, then destroy the closest permanent the finger points to.

+2: Each opponent loses 1 life. You gain life equal to the life lost this way.
−2: Create a 5/5 black Demon creature token with flying. You lose 2 life.
−8: You get an emblem with ", Sacrifice a creature: You gain X life and draw X cards, where X is the sacrificed creature's power."
Ob Nixilis of the Black Oath can be your commander.

This spell can't be countered.
Haste
This creature can't be the target of nongreen spells or abilities from nongreen sources.

This Vehicle gets +1/+1 for each Hamster you control.
Whenever this Vehicle attacks, create three 1/1 red Hamster creature tokens, then it deals X damage to any target, where X is the number of Hamsters you control.
Crew 3

Whenever another creature enters, this creature becomes a copy of that creature, except it has this ability.

Zombies you control have menace. (They can't be blocked except by two or more creatures.)
, Exile a creature card from your graveyard: Create a 2/2 black Zombie creature token.

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
This land enters tapped.
: Add .
, : You may play the exiled card without paying its mana cost if an opponent was dealt 7 or more damage this turn.

You may have It Came from Planet Glurg enter as a copy of X different creatures on the battlefield. (It has their total power, total toughness, combined mana costs, all text boxes, names, art, and so on.)

Destroy target permanent. Its controller creates a 3/3 green Beast creature token.

Trample
Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)
Paradox — Whenever you cast a spell from anywhere other than your hand, create a 2/2 red Alien Warrior creature token.

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)
If this creature would be destroyed, regenerate it. (Tap it, remove it from combat, and heal all damage on it.)
: This creature can't be regenerated this turn. Only your opponents may activate this ability.

(: Add .)

: Add . Put a time counter on Trenzalore Clocktower.
, , Remove twelve time counters from Trenzalore Clocktower and exile it: Shuffle your graveyard and hand into your library, then draw seven cards. Activate only if you control a Time Lord.