Shrine to the Forest Frens

{t}: Add {c}
{t}: Add one mana of any colour. Spend this
mana only to cast Squirrel spells.
Whenever a Squirrel enters the battlefield,
if it has an additional creature type, put an
acorn counter on Shrine of the Forest Frens.
{t}: Remove X acorn counters, add X mana in
any combination of colours to your mana pool.