Mine! Mine! Mine!

•Indestructible, Can't be countered.
•Whenever any opponent taps any color mana, a
copy of that mana becomes an acorn charge.
•Take 1 acorn charge and use for any color mana.
You are able to use as mana charges as you have,
just as long as Mine! Mine! Mine! stays in play.
{bull}{40}{t}: Gain 10 life