Dark Heart of Aurora

Dark Heart of Aurora enters the battlefield with
a charge counter.
{t}, Sacrifice a creature: Add two charge counters
to Dark Heart of Aurora.
{t}, Remove a charge counter: Add a charge
counter to target permanent.
Permanents with charge counters are indestructible and have "{t}: Add one mana of
any color."
In the depths of the aurora's beauty lies a heart
steeped in darkness, yearning for power.