Fire Nation Cadets is a common Creature — Human Soldier card from Avatar: The Last Airbender (TLA), collector number 134. Current market price: $0.17 (foil $0.25), TCGplayer market prices via Scryfall.
This creature has firebending 2 as long as there's a Lesson card in your graveyard. (Whenever this creature attacks, add {R}{R}. This mana lasts until end of combat.) {2}: This creature gets +1/+0 until end of turn.