Tendril of the Mycotyrant is a uncommon Creature — Fungus Wizard card from The Lost Caverns of Ixalan (LCI), collector number 215. Current market price: $0.25 (foil $0.27), TCGplayer market prices via Scryfall.
{5}{G}{G}: Put seven +1/+1 counters on target noncreature land you control. It becomes a 0/0 Fungus creature with haste. It's still a land.