Firebending X, where X is Fire Lord Zuko's power. Whenever you cast a spell from exile and whenever a permanent you control enters from exile, put a +1/+1 counter on each creature you control.
Flying, firebending 2 Whenever you waterbend, earthbend, firebend, or airbend, draw a card. Then if you've done all four this turn, transform Avatar Aang.
Flying Spells you cast cost {W}{U}{B}{R}{G} less to cast. At the beginning of each upkeep, you may transform Aang, Master of Elements. If you do, you gain 4 life, draw four cards, put four +1/+1 counters on him, and he deals 4 damage to each opponent.
When this enchantment enters, airbend up to one target creature. Whenever a creature you control enters, put a quest counter on this enchantment. At the beginning of your end step, if this enchantment has four or more quest counters on it, exile up to one target creature you control, then return it to the battlefield under its owner's control.
Choose up to one target creature, then airbend all other creatures. Until your next turn, your opponents can't cast spells from anywhere other than their hands. Exile Avatar's Wrath.
Vigilance You may look at the top card of your library any time. You may cast Ally spells from the top of your library. Sacrifice Hakoda: Creatures you control get +0/+5 and gain indestructible until end of turn.
Whenever this creature or another Ally you control enters, you gain 1 life. If this is the second time this ability has resolved this turn, draw a card.
Other creatures you control get +1/+0. Whenever another permanent you control leaves the battlefield during your turn, create a 1/1 white Ally creature token. This ability triggers only once each turn.
Whenever you cast a noncreature spell, create a Clue token. {T}: Until end of turn, target artifact token you control becomes a 3/1 Construct artifact creature with flying.
"We're just in the process of improving upon what's already here."
As an additional cost to cast this spell, you may waterbend {6}. Draw two cards. If this spell's additional cost was paid, instead shuffle your graveyard into your library, draw seven cards, and you have no maximum hand size for the rest of the game. Exile Spirit Water Revival.
Flash Prowess When Ty Lee enters, tap up to one target creature. It doesn't untap during its controller's untap step for as long as you control Ty Lee.
Firebending 1 Tap an untapped Ally you control: Exile target card from a graveyard. Whenever this creature attacks, you may cast an Ally spell from among cards you own exiled with this creature.
Each creature with mana value X or less loses all abilities until end of turn. Destroy those creatures.
The solar eclipse robbed Firebenders of their ability to firebend, giving Team Avatar an eight-minute window to storm the capital and defeat the Fire Lord.
Menace Nonbasic lands enter tapped. {7}: Put a conqueror counter on Zhao. As long as Zhao has a conqueror counter on him, nonbasic lands are Mountains.
Search your library for up to four land cards with different names and reveal them. An opponent chooses two of those cards. Put the chosen cards into your graveyard and the rest onto the battlefield tapped, then shuffle.
"Understanding others, the other elements, and the other nations will help you become whole." —Iroh
Trample When this creature enters, put a +1/+1 counter on each other Ally creature you control. Whenever another Ally you control enters, put a +1/+1 counter on this creature.