The Chained Heart

Sacrifice a creature: Put a beat counter on The
Chained Heart
Sacrafice The Chained Heart: Choose one—
•Add X mana of any color to your mana pool,
where X is equal to the number of beat counters
on The Chained Heart.
• Target player mills X cards, where X is equal
to the number of beat counters on The Chained
Heart.