Chain Whip of Amaryl

Whenever a creature attacks, its controller creates
a Gold token. (A Gold token is an artifact with "Sacrifice this artifact: Add one mana of any color.")
{2}{r}, {t}: Chain Whip of Amaryl deals X
damage to target opponent, where X is equal to
twice the number of Golds that opponent
controls.
She collects unpaid debts using metal and words.