Bristly Bill, Spine Sower is a mythic Legendary Creature — Plant Druid card from Secret Lair Drop (SLD), collector number 2621. Current market price: $24.37 (foil $24.65), 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.