Pest Rescuer is a rare Creature — Dryad Druid card from Secrets of Strixhaven Commander (SOC), collector number 90. Current market price: $1.09, TCGplayer market prices via Scryfall.
At the beginning of each upkeep, if you don't control a Pest creature token, create a 1/1 black and green Pest creature token with "When this token dies, you gain 1 life." If you would gain life, you gain that much life plus 1 instead.