When this creature enters, look at the top four cards of your library. You may reveal a Goblin, Swamp, or Mountain card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

As this artifact enters, choose a creature type.
Spells you cast of the chosen type cost less to cast.
When this artifact enters and at the beginning of your upkeep, look at the top card of your library. If it's a card of the chosen type, you may reveal it and put it into your hand. If you don't put the card into your hand, you may put it into your graveyard.

For each spell and ability your opponents control, counter it unless its controller pays .

Put a +1/+1 counter on target creature. That creature gains reach until end of turn. (It can block creatures with flying.)

When this creature enters, return target creature or Vehicle an opponent controls to its owner's hand. If that opponent's speed is greater than each other player's speed, reduce that opponent's speed by 1. This effect can't reduce their speed below 1.

Choose one —
• Target creature you control deals damage equal to its power to target creature an opponent controls.
• Destroy target artifact.

Flying
When Aang enters, airbend up to one other target nonland permanent. (Exile it. While it's exiled, its owner may cast it for rather than its mana cost.)
Whenever you cast a Lesson spell, Aang gains lifelink until end of turn.

When this creature dies, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Bombard deals 4 damage to target creature.

, : Target creature gains haste until end of turn.

: Put a +1/+1 counter on target Mount or Vehicle.

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control seven or more lands and/or Treefolk, create a 3/4 green Treefolk creature token with reach. (It can block creatures with flying.)

Target creature fights another target creature. (Each deals damage equal to its power to the other.)

Choose target opponent. Create two 1/1 colorless Thopter artifact creature tokens with flying. Then the chosen player loses X life and you gain X life, where X is the number of artifacts you control.

Flying
When this creature enters, destroy up to one target artifact or enchantment.

: Add .
As long as this creature is modified, it has ": Add ." (Equipment, Auras you control, and counters are modifications.)

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

Flash (You may cast this spell any time you could cast an instant.)
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Return target creature to its owner's hand.
Harmonize (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by , where X is its power. Then exile this spell.)

Lifelink
When this creature enters, it deals damage equal to the number of Swamps you control to any target.