The Iron Bank

{t} Add {3} to your mana pool of any one color.
Then add 3 debt counters to the Iron Bank.
You may pay X and remove X debt counters
from the Iron Bank.
The Iron Bank deals damage to you equal to the
number of debt counters it has at your end step.
If there are no debt counters on the Iron Bank
at your upkeep create a treasure artifact token.
The Iron bank will have its due.