Sokka, Tenacious Tactician

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Other creatures you control have prowess. (If a creature has multiple instances of prowess, each triggers separately.)

Whenever you cast a noncreature spell, target creature you control can't be blocked this turn.

Whenever Sokka and Suki or another Ally you control enters, attach up to one target Equipment you control to that creature.

Whenever an Equipment you control enters, create a 1/1 white Ally creature token.

Suki's power is equal to the number of creatures you control.

Whenever Suki attacks, create a 1/1 white Ally creature token that's tapped and attacking.

Menace

Other legendary creatures you control have menace.

Whenever you play a legendary land or cast a legendary spell, you draw a card and you lose 1 life.

Firebending X, where X is the number of creatures you control. (Whenever this creature attacks, add X . This mana lasts until end of combat.)

: Create a 1/1 white Ally creature token.

Other creatures you control get +1/+1.

Landfall — Whenever a land you control enters, create a 1/1 white Human Warrior creature token.