Pardofelis's Treasure

{t}, Sacrifice this artefact : add one mana
from any color. Activate only as a sorcery.
Any opponent can pay {3}, add this card to the hand. If this card is removed from the battlefield this way, the owner of Pardofelis the Pilferer add {3}. Until your next end step, you don't lose this mana as steps and phases end.