Cracked Earth Technique is a uncommon Sorcery — Lesson card from Avatar: The Last Airbender Eternal (TLE), collector number 135. Current market price: $0.43 (foil $6.09), TCGplayer market prices via Scryfall.
Earthbend 3, then earthbend 3. You gain 3 life. (To earthbend 3, target land you control becomes a 0/0 creature with haste that's still a land. Put three +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped.)