Treasure Chest of Favorites

Treasure Chest of Favorites enters the battlefield
with X Favorite counters on it. Where X is equal
to number of favorites this card has.
Whenever a player favorites this card, put a
favorite counter on it.
{t}, Remove X favorite counters from this
artifact: Each player creates an Egg artifact with
"{t}, Sacifice this artifact: You gain one mana of
any color."