Jeweled Amulet - Ice Age

1, T: Put a charge counter on Jeweled Amulet. Note what type of mana was used to pay this activation cost. Use this ability only if there are no charge counters on Jeweled Amulet.T: Remove the charge counter from Jeweled Amulet to add one mana of the type last used to put a charge counter on Jeweled Amulet to your mana pool. Play this ability as an interrupt.