Blech, Loafing Pest is a rare Legendary Creature — Pest card from Secrets of Strixhaven (SOS), collector number 298. Current market price: $1.88 (foil $2.38), TCGplayer market prices via Scryfall.
Whenever you gain life, put a +1/+1 counter on each Pest, Bat, Insect, Snake, and Spider you control.