Bristly Bill, Spine Sower is a mythic Legendary Creature — Plant Druid card from Outlaws of Thunder Junction Promos (POTJ), collector number 157s. Current market price: — (foil $49.90), TCGplayer market prices via Scryfall.
Landfall — Whenever a land you control enters, put a +1/+1 counter on target creature. {3}{G}{G}: Double the number of +1/+1 counters on each creature you control.