Bountiful Farmland

Bountiful Farmland enters the battlefield tapped with 4 harvest counters on it.
At the beginning of your upkeep, remove a harvest counter from Bountiful Farmland. When the last counter is removed, create 3 Food artifact tokens with "{t}, sacrifice food: Add {g} or {w} to your mana pool."
{t}: Add {g} to your mana pool. If Bountiful Farmland has no harvest counters on it, add {c} to your mana pool instead.