Swarmyard is a rare Land card from Edge of Eternities: Stellar Sights (EOS), collector number 42. Current market price: $4.58 (foil $6.09), TCGplayer market prices via Scryfall.
{T}: Add {C}. {T}: Regenerate target Insect, Rat, Spider, or Squirrel. (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)