Thelon of Havenwood is a rare Legendary Creature — Elf Druid card from Time Spiral (TSP), collector number 227. Current market price: $0.44 (foil $4.77), TCGplayer market prices via Scryfall.
Each Fungus creature gets +1/+1 for each spore counter on it. {B}{G}, Exile a Fungus card from a graveyard: Put a spore counter on each Fungus on the battlefield.