Chlorophant is a rare Creature — Elemental card from Odyssey (ODY), collector number 234. Current market price: $0.48 (foil $6.00), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, you may put a +1/+1 counter on this creature. Threshold — As long as there are seven or more cards in your graveyard, this creature has "At the beginning of your upkeep, you may put another +1/+1 counter on this creature."