Atmospheric Greenhouse is a uncommon Artifact — Spacecraft card from Edge of Eternities (EOE), collector number 171. Current market price: $0.23 (foil $0.25), TCGplayer market prices via Scryfall.
When this Spacecraft enters, put a +1/+1 counter on each creature you control. Station (Tap another creature you control: Put charge counters equal to its power on this Spacecraft. Station only as a sorcery. It's an artifact creature at 8+.) 8+ | Flying, trample