X, T: Put a charge counter on Ice Cauldron, and put a spell card face up on Ice Cauldron. Note the type and amount of mana used to pay this activation cost. Use this ability only if there are no charge counters on Ice Cauldron. You may play that spell card as though it were in your hand. T: Remove the charge counter from Ice Cauldron to add mana of the type and amount last used to put a charge counter on Ice Cauldron to your mana pool. This mana is usable only to cast the spell on top of Ice Cauldron.