If there are three or more Lesson cards in your graveyard, you may cast this spell as though it had flash.
This spell costs less to cast for each noncreature, nonland card in your graveyard.

This land enters tapped.
: Add or .
, , Sacrifice this land: Draw a card.

Lands you control gain all basic land types until end of turn.
Draw a card.

Look at the top three cards of your library. Put one of those cards into your hand and the rest on the bottom of your library in any order. Put each of those cards into your hand instead if there are three or more Lesson cards in your graveyard.

Enchant creature you control
Enchanted creature gets +1/+1 for each creature card in your graveyard and is an Avatar in addition to its other types.
When enchanted creature dies, mill cards equal to its power. Return this card to its owner's hand and up to one creature card milled this way to the battlefield under your control.

This land enters tapped.
: Add or .
, , Sacrifice this land: Draw a card.

Vigilance
At the beginning of your upkeep, tap this creature.
Whenever you draw your second card each turn, untap this creature.

Whenever you sacrifice another permanent, put a +1/+1 counter on this creature.
When this creature dies, you may exile it. When you do, return target creature card with mana value less than or equal to this creature's power from your graveyard to the battlefield.

Kicker (You may pay an additional as you cast this spell.)
Search your library for a basic land card. If this spell was kicked, instead search your library for a basic land card and a Shrine card. Reveal those cards, put them into your hand, then shuffle.
You gain 2 life.

Kicker (You may pay an additional as you cast this spell.)
Firebending Lesson deals 2 damage to target creature. If this spell was kicked, it deals 5 damage to that creature instead.

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.

When Iroh enters, create a Food token.
At the beginning of combat on your turn, you may have target opponent gain control of target permanent you control. When you do, create a 1/1 white Ally creature token. Put a +1/+1 counter on that token for each permanent you own that your opponents control.

: Add one mana of any color. Activate only once each turn.
, , Sacrifice this artifact: It deals 5 damage to target creature.

This creature gets +1/+0 for each color among Allies you control.
: Earthbend 5. (Target land you control becomes a 0/0 creature with haste that's still a land. Put five +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped.)

This land enters tapped.
: Add or .
, , Sacrifice this land: Draw a card.

Haste
Whenever another Ally you control enters, put a +1/+1 counter on that creature and it gains haste until end of turn.

Firebending 2 (Whenever this creature attacks, add . This mana lasts until end of combat.)
When Azula enters, target opponent exiles a nontoken creature they control, then they exile a nonland card from their graveyard.
During your turn, you may cast cards exiled with Azula and you may cast them as though they had flash. Mana of any type can be spent to cast those spells.

: Add .
: Add one mana of any color. Spend this mana only to cast a Lesson or Shrine spell.
, : Add one mana of any color.

This land enters tapped.
: Add or .
, , Sacrifice this land: Draw a card.

Firebending 1 (Whenever this creature attacks, add . This mana lasts until end of combat.)
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.