Bun Toujo

Despite Sokka's best efforts, neither Boomeraang Squad nor Fearsome Foursome caught on.

Team Avatar

Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of creatures you control.
{2}{W}, Discard this card: It deals damage equal to the number of creatures you control to target creature.

Sokka's Haiku

Counter target spell.
Draw a card, then mill three cards.
Untap target land.

"Set my lines by the riverbed! Caught ten fish and I killed 'em dead!"
—Foggy Swamp Tribe ditty

Foggy Swamp Hunters

As long as you've drawn two or more cards this turn, this creature has lifelink and menace. (It can't be blocked except by two or more creatures.)

Bitter Work

Whenever you attack a player with one or more creatures with power 4 or greater, draw a card.
Exhaust — {4}: Earthbend 4. Activate only during your turn. (Target land you control becomes a 0/0 creature with haste that's still a land. Put four +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped. Activate each exhaust ability only once.)