When this creature enters, draw a card for each opponent who controls fewer creatures than you.

, Sacrifice a creature: You gain 1 life and draw a card.

This land enters tapped.
When this land enters, you gain 1 life.
: Add or .

When this creature enters, amass Zombies 1. (Put a +1/+1 counter on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)
Zombie tokens you control have deathtouch.

This land enters tapped.
: 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.)

This land enters tapped.
When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
: Add or .

As this land enters, you may reveal a Swamp or Mountain card from your hand. If you don't, this land enters tapped.
: Add or .

Destroy all creatures. Each player loses life equal to the number of creatures they controlled that were destroyed this way.

First strike
Boast abilities you activate cost less to activate for each Dragon you control.
Boast — : Create a 5/5 red Dragon creature token with flying. (Activate only if this creature attacked this turn and only once each turn.)

This land enters tapped.
: Add or .

Destroy target creature. If you control an artifact, Unlicensed Disintegration deals 3 damage to that creature's controller.

Magmaquake deals X damage to each creature without flying and each planeswalker.

Flying
Whenever a creature attacks you or a planeswalker you control, you may draw a card.