Slimefoot, the Stowaway is a rare Legendary Creature — Fungus card from Secret Lair Drop (SLD), collector number 1138. Current market price: $10.06 (foil $11.86), TCGplayer market prices via Scryfall.
Whenever a Saproling you control dies, Slimefoot deals 1 damage to each opponent and you gain 1 life. {4}: Create a 1/1 green Saproling creature token.