The Necrobloom is a rare Legendary Creature — Plant card from Modern Horizons 3 Promos (PMH3), collector number 194s. Current market price: — (foil $1.27), TCGplayer market prices via Scryfall.
Landfall — Whenever a land you control enters, create a 0/1 green Plant creature token. If you control seven or more lands with different names, create a 2/2 black Zombie creature token instead. Land cards in your graveyard have dredge 2. (You may return a land card from your graveyard to your hand and mill two cards instead of drawing a card.)