Yigill, Bountiful Blessings

{t} Add {g} to your mana pool.
{2}{t} Add a acorn counter to Yigill, Bountiful Blessings.
Squirrels get 1/1 for each acorn counter on Yigill, Bountiful Blessings. When Yigill, Bountiful
Blessings has 3 acorn counters on it, sacrifice it.
Add {g} to your mana pool for each squirrel you control.