Ecologist's Terrarium is a common Artifact card from Kamigawa: Neon Dynasty (NEO), collector number 246. Current market price: $0.22 (foil $0.29), TCGplayer market prices via Scryfall.
When this artifact enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle. {2}, {T}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.